Science · Grade 10 · Earth Systems and Climate · Term 4

Mitigation Strategies for Climate Change

Exploring various approaches to reduce greenhouse gas emissions and slow the rate of global warming.

• Ontario Curriculum Expectations
• HS-ESS3-4

About This Topic

Mitigation strategies for climate change center on reducing greenhouse gas emissions to slow global warming rates. Students examine methods like shifting energy production to renewables such as solar, wind, and hydroelectric power, enhancing efficiency in buildings and transport, and deploying carbon capture and storage technologies. These approaches target major emission sources, including fossil fuel combustion, and connect to Canadian policies like the Pan-Canadian Framework on Clean Growth and Climate Change.

This topic in the Ontario Grade 10 Earth Systems and Climate unit extends climate science by focusing on human solutions. Students explain emission reduction from energy sectors, analyze renewable effectiveness using capacity factors and lifecycle emissions data, and evaluate carbon capture feasibility considering costs, energy penalties, and storage risks. Such analysis sharpens evidence evaluation and decision-making skills essential for scientific literacy.

Active learning excels with this topic because strategies involve trade-offs best explored through collaboration and simulation. When students debate policy options, model energy transitions with graphs, or audit school carbon footprints, they grasp complexities, build arguments from data, and see personal relevance, turning passive knowledge into actionable understanding.

Key Questions

1. Explain different strategies for reducing carbon emissions from energy production.
2. Analyze the effectiveness of renewable energy sources in mitigating climate change.
3. Evaluate the feasibility and challenges of carbon capture technologies.

Learning Objectives

• Explain three distinct methods for reducing carbon emissions from electricity generation, citing specific technologies.
• Analyze the effectiveness of solar and wind power in mitigating climate change by comparing their lifecycle greenhouse gas emissions and capacity factors.
• Evaluate the economic and technical feasibility of implementing carbon capture and storage (CCS) technologies in industrial settings.
• Compare the environmental benefits and drawbacks of different renewable energy sources for climate change mitigation.

Before You Start

The Greenhouse Effect and Climate Change

Why: Students must understand the fundamental science of how greenhouse gases warm the planet before exploring ways to reduce those gases.

Energy Sources and Transformations

Why: A foundational understanding of different energy sources (fossil fuels, renewables) and how energy is converted is necessary to analyze emission reduction strategies.

Key Vocabulary

Carbon Capture and Storage (CCS)	A set of technologies designed to capture carbon dioxide (CO2) emissions from sources like power plants and industrial facilities, and then store it underground to prevent its release into the atmosphere.
Renewable Energy Sources	Energy derived from natural resources that are replenished at a rate faster than they are consumed, such as solar, wind, hydroelectric, and geothermal power.
Capacity Factor	The ratio of a power plant's actual energy output over a period to its potential maximum output during that same period, indicating how consistently a source produces power.
Greenhouse Gas Emissions	Gases in Earth's atmosphere that trap heat, primarily carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O), which contribute to global warming when released in large quantities.
Energy Efficiency	Using less energy to perform the same task or produce the same result, often achieved through technological improvements or behavioral changes.

Watch Out for These Misconceptions

Common Misconception

Renewable energy can immediately replace all fossil fuels without challenges.

What to Teach Instead

Renewables face intermittency and infrastructure needs, as shown by capacity factors below 30% for solar and wind. Hands-on data graphing in groups helps students compare outputs and plan hybrid systems, correcting over-optimism through evidence.

Common Misconception

Carbon capture technologies fully solve climate change without reducing emissions.

What to Teach Instead

Capture efficiency is 80-90% at best and energy-intensive, not a substitute for cuts. Role-play simulations reveal scalability limits, while peer debates build nuanced views on integrating it with renewables.

Common Misconception

Individual actions matter less than government policies for mitigation.

What to Teach Instead

Personal choices aggregate to significant impacts, like 20% of emissions from transport. Class footprint audits demonstrate collective power, motivating students via shared data discussions.

Active Learning Ideas

Jigsaw: Renewable Energy Sources

Assign small groups one renewable type (solar, wind, hydro, geothermal). Each group researches emissions reductions, costs, and Ontario examples, then teaches the class via posters. Follow with a whole-class comparison chart. Conclude with student votes on best local fit.

50 min·Small Groups

Formal Debate: Renewables vs Carbon Capture

Pairs prepare arguments for or against prioritizing renewables over carbon capture, using provided data on effectiveness and challenges. Hold a whole-class debate with timed rebuttals. Groups reflect on strongest evidence in exit tickets.

45 min·Pairs

Carbon Footprint Strategy Design

Individuals calculate personal or class carbon footprints using online tools. In small groups, redesign lifestyles or school operations with mitigation strategies, ranking by feasibility and impact. Present top three to class.

40 min·Small Groups

Policy Simulation Game

Divide class into stakeholder teams (government, industry, communities). Teams allocate a mock budget across mitigation strategies, negotiating trade-offs. Debrief with data on real-world outcomes in Canada.

60 min·Small Groups

Real-World Connections

• Engineers at Suncor Energy in Fort McMurray, Alberta, are developing and implementing carbon capture technologies to reduce emissions from their oil sands operations, aiming to meet provincial climate targets.
• The Ontario Power Authority manages a diverse energy portfolio, including large-scale wind farms in Prince Edward County and solar installations across the province, to balance electricity supply with climate goals.
• Researchers at Natural Resources Canada are investigating advanced geothermal energy systems, exploring their potential to provide reliable, low-emission baseload power for Canadian communities.

Assessment Ideas

Exit Ticket

On an index card, have students write: 1. One specific strategy for reducing carbon emissions from energy production. 2. One advantage and one challenge of that strategy. 3. One question they still have about climate change mitigation.

Quick Check

Present students with a short case study about a hypothetical town considering a new energy source. Ask them to identify the primary mitigation strategy being proposed, list two pros and two cons based on the case study, and suggest one additional mitigation strategy the town could consider.

Discussion Prompt

Pose the question: 'If you were advising the Canadian government, which two climate change mitigation strategies would you prioritize for investment and why?' Facilitate a class discussion where students justify their choices using evidence about effectiveness, cost, and feasibility.

Frequently Asked Questions

What are key mitigation strategies for reducing carbon emissions from energy?

Core strategies include transitioning to renewables like wind and solar, which cut emissions by displacing coal and gas, and improving efficiency through LED lighting and smart grids. In Ontario, nuclear and hydro already provide low-carbon baseload. Students benefit from comparing lifecycle emissions data to see renewables reduce emissions by 90% versus coal, fostering informed policy views.

How effective are renewable energy sources in mitigating climate change?

Renewables like solar and wind have scaled globally to 30% of electricity, avoiding 2.5 billion tonnes of CO2 yearly. Effectiveness depends on storage for intermittency; Ontario's mix with hydro boosts reliability. Data analysis activities help students quantify impacts, such as wind farms offsetting emissions equivalent to 1 million cars annually.

What are the main challenges of carbon capture technologies?

Challenges include high costs (over $100/tonne CO2), energy penalties up to 30% of plant output, and safe storage needs to prevent leaks. Scalability lags, with current capture at 40 million tonnes yearly versus needed billions. Case study reviews in class clarify why it's a complement, not replacement, for emission cuts.

How can active learning help students understand mitigation strategies?

Active approaches like debates and simulations make trade-offs tangible: students role-play budgeting for renewables versus capture, using real Canadian data. Group audits of school emissions reveal personal stakes, while jigsaw research ensures deep knowledge sharing. These methods build critical thinking, as collaborative evidence evaluation outperforms lectures, with 75% retention gains per studies.