Climate Change Cheat Sheet 2026

The 30 highest-yield Climate Change facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. An emissions trading scheme (cap-and-trade) controls total emissions by: → Setting an overall cap and letting firms buy and sell allowances
2. Which region on Earth is warming at roughly four times the global average rate? → The Arctic
3. Which process describes how CO₂ and other greenhouse gases trap heat in the atmosphere? → They absorb and re-emit outgoing infrared radiation toward Earth's surface
4. Which coastal ecosystems are recognized as the most effective stores of 'blue carbon'? → Mangroves, seagrasses, and salt marshes
5. Which agricultural practice is considered a significant source of methane emissions contributing to climate change? → Flooded rice paddies and livestock digestion
6. What is 'peak water' and which of these U.S. regions is most likely to experience it first? → The point at which water demand exceeds maximum sustainable supply; the arid Southwest
7. What is the concept of 'planetary boundaries' in environmental science? → A framework defining safe operating limits for Earth's major systems
8. How does climate change affect hurricane intensity? → Warmer ocean temperatures provide more energy, increasing the intensity of storms
9. Which human activity is the largest contributor to carbon dioxide emissions? → Burning fossil fuels
10. What is the approximate global warming potential of methane (CH4) compared to CO2 over a 20-year timeframe? → About 80 times more potent
11. How does energy efficiency contribute to climate change mitigation? → Reducing overall energy consumption
12. Which security measure is essential for protecting Climate Change digital systems? → Implementing multi-factor authentication
13. Which feedback mechanism involves increased water vapor amplifying warming caused by CO₂? → Water vapor feedback
14. The Colorado River no longer reliably reaches the ocean due to overuse and drought. This is an example of what water resource phenomenon? → Terminal drying
15. Marine heatwaves are formally defined as periods when sea surface temperatures exceed what threshold? → The 90th percentile of local climatological temperatures for at least 5 consecutive days
16. Which U.S. region is most threatened by saltwater intrusion into coastal freshwater aquifers due to sea-level rise? → Florida and Gulf Coast
17. What is a 'carbon border adjustment mechanism' (CBAM), as implemented by the European Union? → A charge on imports from countries with weaker carbon pricing to prevent carbon leakage
18. What is 'thermal expansion' and why is it significant for sea level rise? → The increase in ocean volume as seawater warms and expands
19. Which mitigation approach involves capturing CO₂ directly from the atmosphere using machines rather than natural systems? → Direct air capture (DAC)
20. A company claims it is 'carbon neutral' by purchasing Renewable Energy Certificates (RECs). Which criticism is commonly raised about this approach? → RECs do not reduce actual fossil fuel combustion if additionality is lacking
21. Which concept describes setting sustainability targets based on what the science says is required globally rather than what is convenient for a single company? → Science-based targeting
22. Which US region is projected to face the greatest increase in 'heat island' intensity as climate change progresses? → Dense urban areas in the South and Southwest
23. What is system integration in Climate Change technology? → Connecting different systems to work together seamlessly
24. What is coral bleaching? → A stress response in which corals expel their symbiotic zooxanthellae algae, turning white
25. Which approach best supports quality outcomes in Renewable Energy Technologies for Climate Change? → Systematic application of evidence-based methods
26. How does climate change affect the geographic range of crop pests and diseases in the U.S.? → Warmer winters allow pests to survive and spread into previously cold regions
27. What is 'downcycling' in the context of recycling? → Recycling materials into lower-quality products
28. Which ocean phenomenon, intensified by climate change, causes mass coral bleaching events? → El Niño-driven marine heatwaves
29. What is 'managed retreat' in the context of coastal climate adaptation? → Strategically relocating communities and infrastructure away from vulnerable shorelines
30. Which organization developed the Integrated Reporting () Framework that links financial and non-financial performance? → International Integrated Reporting Council (IIRC)