National University of Singapore · FACULTY OF ENVIRONMENTAL SCIENCE

DSS5101 Principles of Sustainability

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The Complete Study & Assessment Guide · Sem 1 AY26/27

DSS5101 Overview

Principles of Sustainability

— Seventeen goals, one planet, and the data to tell whether either is working

National University of Singapore
Semester 1, AY2026/27
Postgraduate
4 units
Graded coursework, no final exam

What this course asks you to do

DSS5101 examines sustainability by way of the UN Sustainable Development Goals.

Assessed entirely through coursework Five components summing to 100%, four of them group projects, and the course states there is no final exam.
The data project carries the most weight CA2 is worth 30% and asks for one goal, a testable hypothesis and published indicator data in no more than 1,500 words.
Growth is a means, not a pillar The four-dimension reading of Brundtland refuses to let economic gains offset ecological losses.
Averages hide who is left behind The pledge at the heart of the goals is judged group by group, which is why disaggregated data matters.

DSS5101 · National University of Singapore

An independent, AskSia-authored study guide. AskSia is not affiliated with, endorsed by, or sponsored by National University of Singapore; the course code and name are used for identification only.

Assessment

How DSS5101 is assessed

Component	Weight	Format
CA1: Group timeline project	20%	A graphical timeline, not an essay, of the events and meetings leading to the 17 goals and to key outcomes under the climate convention, submitted as one high-resolution PDF with APA references. Due 29 Aug 2026; 1% is deducted for each day late.
CA2: Group assignment, SDGs and Data	30%	Choose one goal, frame a research question as null and alternative hypotheses, analyse published indicator data and report in nine set sections, no more than 1,500 words excluding references and appendix. Due 24 Oct 2026.
CA3: Self-directed field trip group report	25%	A group report on the URA City Gallery visit that replaces the Week 6 lecture, covering Singapore's planning parameters, policies and global contribution plus one chosen Singapore Green Plan area. Due 17 Oct 2026.
CA4: Group presentations	20%	Student impact project presentations in the Week 12 and 13 lecture slots on 3 and 10 Nov; the assessment page lists 31 Oct 2026.
Class participation and attendance, including peer reviews	5%	Ongoing. An absence needs a medical certificate or a valid reason sent to the lecturer.

The five published weights total 100%, and the assessment page states that there is no final exam. The course materials reviewed here publish no hurdle, minimum-mark or pass condition for any component, so none is claimed in either direction. Two details differ between documents: the CA1 assignment page lists the timeline at 15% in its parameters while the assessment page and the assignment's points value give 20%, and a Week 2 slide gives 28 Oct for the data report while the assessment and assignment pages give 24 Oct. This guide follows the assessment page, the only reading under which the weights sum to 100.

Current dates · verify in LMS

Current DSS5101 dates

Date	Item	Control
29 August 2026	CA1 timeline due	The date on the assessment page and the CA1 assignment.
12 September 2026	Optional gallery session	A Saturday morning at the URA City Gallery with teaching staff available for questions.
19 to 27 September 2026	Reading week	No lectures.
17 October 2026	CA3 field report due	The date listed on the assessment page.
24 October 2026	CA2 data report due	The date on the assessment page and the CA2 assignment.
31 October 2026	CA4 listed date	Presentations take place in the Week 12 and 13 slots on 3 and 10 November.

Dates are as published in the course materials for this offering. Confirm exact deadlines and submission settings in the live LMS.

Contents · every chapter, one map

What DSS5101 covers

Ten chapters move from the Brundtland definition and the planetary boundaries, through the goals and the arguments about how they interact, to the climate treaties, indicators and data, regional cases and carbon accounting.

Brundtland and the Dimensions of Sustainable Development

Needs and limitations, equity across and within generations, three pillars against four thresholded dimensions

A definition with two working parts

The course begins with Our Common Future, the 1987 Brundtland report.

The Brundtland definition and its two key concepts, needs and limitations
Environment and development treated as a single problem
Equity between generations and within the present one
Three pillars set against four primary dimensions
The 2030 thresholds and how the footprint ceiling was derived
Weak, strong and very strong sustainability

Planetary Boundaries and the Polycrisis

The boundaries crossed and not crossed, reading a boundary as risk, and the pace of cuts for 1.5 and 2 degrees

A polycrisis with physical limits

The course synopsis describes the present as a polycrisis in which climate change, conflict and biodiversity loss arrive together, and the Week 1 outline places it in the age of the Anthropocene.

The polycrisis framing in the course synopsis
Nine Earth-system processes and the safe operating space
Six boundaries transgressed in the 2025 update
Ozone, aerosols and ocean acidification inside the line
The blood-pressure reading of a boundary
Emissions cuts needed for 1.5 and 2 degrees

From Stockholm to the 2030 Agenda

Stockholm, Brundtland, Rio, Kyoto, the Millennium goals and Paris, and how to build the timeline project

The events that produced the goals

The Week 2 lecture compresses fifty years into one slide, and the first graded project asks your group to rebuild and extend it as a diagram.

Stockholm 1972, UNEP and the first declaration
The Brundtland Commission and its 1987 report
Rio 1992 as the fork into climate and biodiversity branches
Kyoto adopted in 1997 and in force in 2005
From eight Millennium goals to seventeen SDGs
Designing the CA1 timeline against its rubric

Leaving No One Behind in the Global Goals

The five Ps, goals, targets and indicators, disaggregated data and national targets

Seventeen goals built on five Ps

The 2030 Agenda describes itself as an action plan for people, the planet and prosperity, one that also aims at universal peace and is carried out through partnership. Those five Ps organise its preamble.

People, planet, prosperity, peace and partnership
Seventeen goals and 169 targets described as indivisible
The pledge to reach the furthest behind first
Disaggregation by income, sex, age, place and more
Gaps the averages hide, from schooling to child survival
Global targets translated into national ones

Synergies and Trade-offs Between the Goals

How goal interactions are measured, which goals help and hinder each other, and how to read the evidence

Testing whether the goals pull together

The Agenda asserts that its goals are integrated and indivisible.

Synergy and trade-off defined as helping or hindering
Official indicator data for 227 countries
No poverty and good health as synergy leaders
Responsible consumption as the most conflicted goal
Why growth-led welfare produces trade-offs
Three cautions: causality, shared indicators, missing data

Kuznets Curves and the Tragedy of the Commons

Inequality and income, the environmental curve and its three effects, and why carbon dioxide does not turn down

The original curve and the pledge

The Week 2 lecture introduces the Kuznets curve while discussing the pledge to leave no one behind.

The inequality curve and rural-to-urban migration
Why the goals refuse to wait for inequality to fall
The environmental curve and its three effects
Panayotou's income bands
Local pollutants against carbon dioxide
The tragedy of the commons and the pollution haven

Climate Action from Kyoto to Paris

Binding targets against nationally determined pledges, the market mechanisms, Kyoto accounting and the Paris cycle

SDG 13 runs through the climate convention

Goal 13 calls for urgent climate action on both causes and effects, and the Agenda acknowledges the UN climate convention as the primary forum for negotiating the global response.

SDG 13 and the primacy of the climate convention
Kyoto's six gases and the 5 per cent aim
Emissions trading, joint implementation and the CDM
Assigned amounts, reserves and the 1.3 penalty
Paris goals, NDCs and the five-yearly stocktake
Mitigation, adaptation and loss and damage

Measuring Progress: Indicators, Tiers and Data

Indicator tiers, data gaps and reliability, and framing the hypotheses and report for the data project

How the goals are counted

Each goal is divided into targets and each target into indicators, numbered goal, target, indicator.

Goal, target and indicator numbering
Tier I and Tier II and what each allows
Choosing one goal and one question for CA2
Writing null and alternative hypotheses
Reliability, gaps and tiers as required checks
The nine-section report and its appendix

Biodiversity and Sustainable Cities in Southeast Asia

Life on land and below water, a coal-mining case, regional pressures and the Singapore field report

Life on land and below water

Week 4 turns to biodiversity’s contribution to sustainable development through Goal 14, conserving the oceans, seas and marine resources, and Goal 15, protecting and restoring terrestrial ecosystems, managing forests, combating desertification and halting biodiversity loss.

Goals 14 and 15 and their early deadlines
The biodiversity convention and a coal-mining case
Oil palm, water, poaching, sea level and plastics
Goal 11 and the city as a unit of analysis
The URA City Gallery field trip
Choosing one Green Plan area for CA3

Carbon Accounting, Reporting and the Energy Transition

Inventories and scopes, reporting standards, offsets and net decrease, and the clean energy transition

From treaty accounting to organisational accounting

The Week 10 lecture defines carbon accounting as measuring, tracking and reporting the greenhouse gas emissions of an organisation under standardised frameworks, including the calculation of Scope 1, 2 and 3 emissions.

National inventories, registries and true-up
Scope 1, Scope 2 and Scope 3 emissions
CSR, ESG, TCFD and TNFD reporting
Why an offset is not a reduction
Net decrease and discounted credits
Fossil supply and the clean energy transition

Its synopsis sets out the aim plainly: to examine critically how environmental, social and economic factors connect in the search for a just and sustainable future, against a polycrisis in which climate change, biodiversity loss and conflict arrive together.

Lectures, discussions, case studies and independent research build an understanding of the goals and how they apply across sectors, with particular attention to the region, since its countries are closely linked by economy, climate and geography. The emphasis throughout is on critical thinking and evidence-based solutions.

How the teaching is sequenced

The first five weeks carry most of the conceptual material.

Week 1 lays the foundations: the Anthropocene, the Brundtland report and its three pillars, the four primary dimensions of sustainable development, Agenda 21 and social-ecological systems. Week 2 introduces the goals themselves, from the 2030 Agenda and the five Ps to indicators, the pledge to leave no one behind, the Kuznets curve and the trade-offs between goals.

Week 3 is a deep dive into climate action, covering the science, the climate treaties, mitigation and adaptation. Weeks 4 and 5 turn to biodiversity and to pressures specific to Southeast Asia, and Week 6 is a self-directed field trip to the URA City Gallery on sustainable cities.

After reading week, invited speakers from finance, natural resource management, public health and international conservation alternate with a lecture on carbon accounting, reporting and the energy transition, and the final two weeks are given to student presentations.

How it is assessed

The course states that there is no final exam.

Five components carry the grade: a group timeline of the events that produced the goals, a group data project on one goal, a group report on the field trip, group presentations, and a small weight for participation and attendance including peer reviews. The data project is the largest single piece and runs from the second week to late October.

Every group component rewards the same habit: naming the framework you are using, applying it to a specific case and stating the limit of your conclusion.

How this guide is organised

Ten chapters follow the lecture sequence. Three set out what sustainable development means, from the Brundtland definition and planetary boundaries to the history of the goals.

Three examine the goals and how they interact, including the pledge to leave no one behind, measured synergies and trade-offs, and Kuznets curves. Four turn to acting and measuring: the climate treaties, indicators and data, biodiversity and cities in the region, and carbon accounting. Each chapter works one case in full and ends with practice shaped like the graded projects.

Worked example · free

Reading a progress report figure correctly

Q [6 marks]. The 2025 SDG progress report cited in the climate lecture says that of 139 targets with sufficient trend data, 15 per cent are on track, 21 per cent show moderate progress and 15 per cent have fallen back below where they stood in 2015. Convert each share into an approximate number of targets and state one conclusion the figures support and one they do not. The step weighting shown here is an AskSia study allocation and is not a University marking scheme.

Figure 1.2. The spectrum Holden and colleagues use. They adopt strong sustainability and reject the very strong end because it would place ecology above the other three dimensions.

3Convert each percentage into a count of targets.
1State a conclusion the counts support.
2State a conclusion they cannot support.

On track: 0.15 x 139 = 20.85, about 21 targets. Moderate progress: 0.21 x 139 = 29.19, about 29 targets. Fallen back below 2015: 0.15 x 139 = 20.85, about 21 targets. Together that is roughly 71 of 139, so the remaining 68 or so are the ones the report describes as advancing only marginally or not at all. The figures support the conclusion that about as many targets have gone backwards as are on track. They do not show which countries or groups are behind, because the shares are global aggregates, and they say nothing about the targets that lack sufficient trend data, which are outside the 139.

Sia tip — Before quoting any progress percentage, write down its denominator. A share of assessable targets is not a share of all targets, and a global share is not a statement about any one country.

Glossary

Key terms

Sustainable Development: Development that satisfies present needs while leaving future generations able to satisfy theirs.
Planetary Boundaries: Limits set for nine Earth-system processes, inside which humanity is judged to have a safe operating space.
Five Ps: People, planet, prosperity, peace and partnership, the five headings of the 2030 Agenda's preamble.
Disaggregated Data: Data broken down by characteristics such as sex, age, income or location so that disparities hidden in averages become visible.
Synergy: A relationship in which progress on one goal favours progress on another.
Trade-off: A relationship in which progress on one goal hinders progress on another.
Environmental Kuznets Curve: The hypothesis that environmental degradation rises with income to a turning point and then falls.
Nationally Determined Contribution: The climate pledge each country sets for itself under the Paris Agreement.
Tier I Indicator: An indicator with an established method and data regularly produced for at least half of countries and population in each relevant region.
Scope 3 Emissions: Indirect emissions across an organisation's value chain beyond its own sources and purchased energy.

FAQ

DSS5101 FAQ

How is Principles of Sustainability assessed?

Through five components that sum to 100 per cent: a group timeline worth 20, a group data project worth 30, a group field-trip report worth 25, group presentations worth 20 and participation worth 5. The assessment page states that there is no final exam.

What definition of sustainable development does the course use?

It starts from the Brundtland report's definition, development that serves today's needs while protecting the prospects of later generations, and then compares the three-pillar model with a stricter four-dimension reading that sets thresholds and refuses to trade one dimension against another.

What are the planetary boundaries?

Nine Earth-system processes, each given a limit that marks a safe operating space for humanity. The update presented in the climate lecture reports six of them as crossed, including climate change, biosphere integrity and land system change.

Do the Sustainable Development Goals support or undermine each other?

Both. A study discussed in the second lecture found synergies outweigh trade-offs overall, with no poverty helping most goals, while responsible consumption and production conflicts with other goals more often than any other goal.

Does economic growth eventually reduce pollution?

For some local pollutants such as sulphur dioxide there is evidence of a turning point, but the lecture reports no such evidence for carbon dioxide, which accumulates globally and creates a tragedy of the commons.

How do the Kyoto Protocol and the Paris Agreement differ?

Kyoto set binding targets for developed countries and relied mainly on market mechanisms. Paris covers every country through self-set pledges, reported transparently and reviewed at a global stocktake every five years.

What does the data project involve?

Groups of four or five choose one goal, frame a research question as null and alternative hypotheses, check the reliability, gaps and tier of their indicator, and report in no more than 1,500 words plus references and an appendix with the data.

Chapter questions

Questions students ask in each DSS5101 chapter

What are the two key concepts in the Brundtland definition?: Needs and limitations. Needs refers to the basic needs of the poorest people, which the report places ahead of everything else. Limitations means the constraints that technology and social organisation place on what the environment can supply now and in future, which the report treats as changeable rather than fixed. Chapter 01 · Brundtland and the Dimensions of Sustainable Development
How many planetary boundaries have been crossed?: The 2025 update presented in the climate lecture reports six of the nine as transgressed: climate change, novel entities, biosphere integrity, nitrogen and phosphorus flows, freshwater change and land system change. Stratospheric ozone, aerosol loading and ocean acidification remain inside their boundaries. Chapter 02 · Planetary Boundaries and the Polycrisis
What should a sustainable development timeline start with?: The CA1 brief suggests the Brundtland Commission as a good place to begin, and the Week 2 lecture's summary starts earlier with Sweden's 1968 proposal and the 1972 Stockholm conference. Starting at Stockholm lets the diagram show why the commission was needed. Chapter 03 · From Stockholm to the 2030 Agenda
What are the five Ps of the Sustainable Development Goals?: People, planet, prosperity, peace and partnership. They are the headings of the 2030 Agenda's preamble, each naming a commitment: ending poverty and hunger, protecting the planet, prosperity in harmony with nature, peaceful and inclusive societies, and a revitalised global partnership. Chapter 04 · Leaving No One Behind in the Global Goals
Which goals show the most synergies?: No poverty is synergistic with most other goals and appears repeatedly among the strongest pairs, and good health also ranks highly. Within their own indicators, goals such as no poverty, health, education, reduced inequality, responsible consumption and climate action show mostly positive relationships. Chapter 05 · Synergies and Trade-offs Between the Goals
What is the Kuznets curve in simple terms?: It is the idea that inequality rises in the early stages of industrialisation, as workers leave farms for cities and compete for jobs, and then falls once incomes are high enough for mobility and welfare states to spread. The lecture treats it as a hypothesis that recent evidence has challenged. Chapter 06 · Kuznets Curves and the Tragedy of the Commons
What is the main difference between the Kyoto Protocol and the Paris Agreement?: Kyoto set legally binding emission targets for developed countries only. Paris covers every country but lets each set its own nationally determined contribution, relying on transparency and a five-yearly global stocktake rather than penalties to raise ambition. Chapter 07 · Climate Action from Kyoto to Paris
What is the difference between Tier I and Tier II indicators?: Both have a clear concept and an established method. Tier I indicators also have data regularly produced for at least half of countries and population in each relevant region, while Tier II indicators do not, so comparisons using them face more gaps. Chapter 08 · Measuring Progress: Indicators, Tiers and Data
What do Goals 14 and 15 cover?: Goal 14 covers conserving and sustainably using the oceans, seas and marine resources. Goal 15 covers protecting and restoring terrestrial ecosystems, managing forests sustainably, combating desertification, halting land degradation and halting biodiversity loss. Chapter 09 · Biodiversity and Sustainable Cities in Southeast Asia
What is the difference between Scope 1, 2 and 3 emissions?: Scope 1 is direct emissions from sources an organisation owns or controls. Scope 2 is indirect emissions from the electricity, heat or steam it buys. Scope 3 is every other indirect emission in its value chain, which is usually the largest and hardest to measure. Chapter 10 · Carbon Accounting, Reporting and the Energy Transition

Study strategy

How to prepare for the assessments

Choose your group's goal and indicator in the second week and let every later topic feed it. The timeline explains where the goal came from, the interaction and Kuznets chapters tell you what it trades against, and the indicator chapter tells you how far the data can be trusted. A data project built that way is argued rather than merely calculated.

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