🕘 Lesson at a Glance | Te Hōtaka
Lesson Overview | Tirohanga Whānui
Lesson 5 ended on a hard truth: Antarctica is less safe than the models once thought. This lesson looks at the thing actually doing the damage — greenhouse emissions — and gets honest about where they come from. Ākonga read Aotearoa's emissions profile, map the evidence a real household footprint calculation would require, and then take on the contested question: is climate change best fixed by individuals changing their behaviour, or by changing the system? The science skill underneath it all is evaluating strategies with evidence — deciding what actually works.
Learning Intentions | Ngā Whāinga Ako
- Describe Aotearoa's emissions profile — its main sources and rough proportions — and connect that carbon to the warming of Antarctica.
- Identify the evidence needed for a defensible household carbon estimate and locate where individual choice ends and structural power begins.
- Evaluate, with evidence, the effectiveness of different climate strategies — individual and systemic.
⚡ Do Now
⏱ 5 minMost people guess their carbon footprint wrong. Let's find out.
- Notice (2 min): in your book, write your honest guess — what is your single biggest source of greenhouse gas emissions? Many people say plastic bags or leaving lights on — things that matter, but are tiny next to diet, transport, and home heating.
- Wonder (3 min): the carbon warming the planet is invisible — you can't see it or feel it, and it does its damage far away, thinning the very ice shelves we met in Lesson 1. How do you take responsibility for something you can't see? Jot one idea.
Activity 1 · Aotearoa's Emissions Profile
⏱ 15 minWhat it is: Before you can evaluate a strategy, you need to know where the carbon actually comes from. Aotearoa's profile is unusual among wealthy countries — and knowing it changes which solutions make sense.
New Zealand's gross greenhouse gas emissions, by sector (approx., Ministry for the Environment 2022 inventory):
🇳🇿 What makes Aotearoa unusual
Our electricity grid is already roughly 85% renewable (hydro, geothermal, wind), so electrifying transport and heating can shift fossil-fuel demand. But agriculture is 53% of gross emissions, mainly biogenic methane and nitrous oxide. That mix is why "just switch to EVs" only gets us part way.
📐 Gross is not personal
The national inventory counts emissions produced in Aotearoa by economic sector. A household footprint uses different boundaries and needs real activity data — kilometres travelled, fuels used, flights, food and purchases. Dividing the national total by population does not produce a valid personal calculator.
🏛️ He Pou a Rangi — Climate Change Commission
An independent body set up under the Zero Carbon Act (2019) to advise government on meeting our emissions budgets and 2050 net-zero target. Its advice: electrify transport, swap gas heating for heat pumps, cut livestock methane, plant natives, build compact cities — and partner with Māori on land-based solutions.
🧊 Back to the ice — why getting the science right matters
Every tonne in those bars ends up in the same atmosphere and ocean. The CO₂ raises global temperature; the Southern Ocean absorbs much of that heat and is warming the ice from beneath. This is the carbon cycle from Lesson 1 — carbon moving between Earth's spheres — written in numbers.
And here's the part that overturns an old story: for decades many models treated Antarctica, especially the huge East Antarctic ice sheet, as the resilient one — too cold and vast to change fast. That turned out to be wrong. The Larsen B ice shelf shattered in weeks in 2002; the Conger shelf collapsed in 2022; and glaciers like Thwaites are retreating faster than expected. The IPCC's 2021 report (AR6) now flags Antarctic ice-sheet instability as a low-likelihood, high-impact unknown for sea-level rise. The place we thought was safe isn't — which is exactly why the numbers in this lesson are worth getting right.
Run it — read the profile
- Notice (6 min): in pairs, find the one sector that surprises you most. Why is NZ's profile so different from, say, a country whose emissions are mostly coal-fired electricity?
- Connect (9 min): pick one He Pou a Rangi recommendation. Which sector does it target, and why would it work here given our profile? Write two sentences you can defend in the debate later.
Activity 2 · Map Your Emissions Evidence
⏱ 20 minWhat it is: A defensible pre-calculator evidence map. Ākonga identify what a real footprint estimate would need, then distinguish the choices they influence from the systems other decision-makers control. No invented conversion factors and no compulsory disclosure of household data.
| Category | Evidence a calculator would need | Who can change it? |
|---|---|---|
| Everyday transport | Distance, mode, vehicle fuel or electricity use, number of passengers | Individual · whānau · transport planners |
| Flights | Routes, cabin class and number of trips over a stated period | Individual · whānau · employer |
| Food | Eating pattern, quantities, origin and avoidable food waste | Individual · whānau · suppliers |
| Home energy | Metered electricity and fuel use, heating type, dwelling efficiency | Whānau · landlord · energy system |
| Goods and services | What was bought, how long it lasts, repair/reuse and supply-chain data | Individual · producer · policy |
Run it — evidence before arithmetic
- Map (8 min): work down Part A of the worksheet. For each category, name the data needed and whether you could access it. Learners may use a fictional household if they prefer.
- Rank (5 min): predict which two categories a proper calculator might rank highest. Mark the prediction as a hypothesis, not a measured result.
- Locate power (7 min): choose three possible changes and label the strongest decision-maker — individual, whānau, school, business, local government or central government.
🪶 Handle with care: some ākonga come from households with fewer choices — no EV, an older home with gas heating, a tight budget. This activity is about understanding the system, not judging any family. Keep the framing on where change has the biggest impact and who holds the power to make it.
Activity 3 · The Big Debate — Individual or Systemic?
⏱ 25 minWhat it is: The science skill at the heart of this lesson — evaluating strategies with evidence. Ākonga weigh a genuinely contested question and take a reasoned position, drawing on the national sector profile from Activity 1 and the evidence-and-power map from Activity 2.
"Is fixing climate change mainly the job of individuals changing their behaviour, or governments and corporations changing the system — or both, and in what proportion?"
Side A · Individual responsibility
- Millions of consumer choices aggregate into real market signals — they grew plant-based food, EVs, rooftop solar.
- Leading by example normalises lower-carbon living and builds the credibility to demand more.
- Kaitiakitanga is personal — you can't outsource guardianship to "the system."
Side B · Systemic / structural change
- The term "carbon footprint" was popularised by a BP advertising campaign (2004) — shifting blame from industry to consumers.
- A small number of large producers account for a huge share of global emissions; individuals can't vote those away with shopping.
- Agriculture is Aotearoa's largest gross-emissions sector and needs farm-level, supply-chain and policy change, not just consumer choices. Structural barriers (no buses, costly EVs) also constrain individual action.
🌀 The kaitiaki reframe
Kaitiakitanga refuses the either/or. A kaitiaki acts at every level at once — tinana (self), whānau, hapū, and beyond. The waka says it best: everyone must paddle (individual action) and the waka must be steered well (systemic leadership). The real question isn't "individual or system" — it's "what am I called to do at each level?"
Run it — take a reasoned position
Pick one format:
- Video Activity: Aotearoa New Zealand's first emissions reduction plan | What it will mean for you and your whānau — companion watch handout
- Position continuum: stand on a line from "purely individual" to "purely systemic," explain your spot, and move if someone changes your mind.
- Structured debate: two teams, short speeches and rebuttals, a class vote before and after — did minds change?
- Socratic circle: each speaker must build on the last point before adding a new one.
Then, individually (Part B of the worksheet): write your position — name the proportion you'd put on individual vs systemic, back it with one piece of evidence from today, and name the strongest point on the other side. A good answer evaluates; it doesn't just pick a team.
Exit · Quick Check — He Aha i Mau i a Koe?
⏱ 5 minOn a slip or in their book, each ākonga finishes these three sentences before they leave:
- My biggest single source of emissions is… and my top change would be…:
- One strategy I think genuinely works, and the evidence for it:
- How the carbon we measured today connects to what's happening to Antarctica:
🎯 Curriculum Links | Te Hononga ki te Marautanga
This lesson's focus: Ākonga trace where Aotearoa's emissions actually come from — including combustion and land use — and identify what evidence is needed before assigning emissions to a household. They then use the national profile and their evidence map to weigh mitigation strategies.
Earth and Space Science — Core Connection (Phase 4 | Years 9–10)
"Human activities remove carbon from the lithosphere (e.g. combustion of fossil fuels, cement production) and biosphere (e.g. logging) and release it into the atmosphere."
📑 View the full verified Te Mātaiaho curriculum alignment for this unit → — Phase 4 · Years 9–10 (statements pulled verbatim from the live curriculum).
📦 Materials & Resources
📋 Handouts & what you'll need
- Carbon Evidence & Strategy worksheet — Part A (evidence map) used in Activity 2; Part B (evaluate a strategy) used in Activity 3
- Student books; devices for a reputable online calculator (optional hypothesis test only)
🔗 Data & calculators
- Ministry for the Environment — NZ Greenhouse Gas Inventory (sector data)
- He Pou a Rangi / Climate Change Commission — emissions budgets & advice
- WWF NZ or Toitū / Carbon Zero personal footprint calculators
🎧 Media
- RNZ — Our Changing World: Antarctica — Climate ↗ — NZ glaciologists on past climates and what today's warming means for the ice. A strong listening anchor for the Activity 1 ice-bridge.
- Aotearoa New Zealand's first emissions reduction plan | What it will mean for you and your whānau — embedded in Activity 1 as the strategy stimulus, with a "watch with a job" task. Watch on YouTube ↗ (oEmbed-verified)
📊 Assessment Framework
This is a single lesson, so assessment here is formative — reading for learning as it happens. The unit's summative assessment sits at the end of the unit, not in this lesson.
What to look for, mapped to the learning intentions
- The profile (LI 1): can ākonga name NZ's top sectors with rough proportions and explain why our profile is unusual — and link the carbon to Antarctica's warming?
- Their evidence map (LI 2): have they named the data a real estimate requires, kept predictions distinct from measurements, and located personal vs systemic power?
- Evaluating strategies (LI 3): in the debate and Part B, do they back a position with evidence and name the strongest counter-point — not just pick a side?
🚀 Extension & Mahi
🏫Your School's Footprint
Self-directed, optional. Design a school footprint data plan — what would you measure about travel, heating, electricity, canteen waste and trips, over what period, and with whose permission? Predict three promising changes, clearly labelled as hypotheses until the data is collected.
🗣️Whānau Carbon Kōrero
Optional whānau kōrero: discuss one climate strategy without sharing household data or asking anyone to make a commitment. Record the strongest practical barrier and which decision-maker could remove it.
📈He Pou a Rangi Research
Read a summary of the Climate Change Commission's latest progress report. Where is NZ on track, and where is it falling behind on agriculture and transport?
🔗 Unit Progression & Next Steps
This is Lesson 6 of the 8-lesson Antarctica unit — the numbers that turn values into evidence. Where it sits:
← Lesson 5: Community Solutions
Real Aotearoa kaitiaki responses, studied as case studies — the carbon sinks this lesson now quantifies.
→ Lesson 7: Kaitiaki Action Plan
Bring the whole unit together — the campaign, the case studies, and these numbers — into a real action plan.
Into Lesson 7: your emissions evidence map and your evidenced position on what works are raw material for the class Kaitiaki Action Plan. Keep them safe.
📋 Teacher Planning Snapshot
Ngā Paearu Angitū — Success Criteria
- ✅ I can describe Aotearoa's emissions profile and connect that carbon to Antarctica's warming. (LI 1)
- ✅ I can identify the evidence a carbon estimate needs and distinguish individual influence from structural power. (LI 2)
- ✅ I can evaluate the effectiveness of different climate strategies with evidence, and weigh the strongest counter-argument. (LI 3)
Differentiation for this lesson
- The numbers: give entry-level ākonga the sector cards pre-sorted and ask them to find the surprise; ask extension ākonga to compare NZ's profile with a coal-heavy country and explain the difference.
- Evidence map / ELL: model one fictional household category; allow labelled diagrams and kōrero in a first language before the written reflection.
- Equity care: household carbon is tied to income and housing — keep the framing systemic, never a judgement of any family's choices (see the note in Activity 2).
Broader differentiation and the unit-wide mātauranga framing live on the unit overview.