Across
- 5. A building standard that minimizes energy use and is nearly airtight (10)
- 7. The world’s largest offshore wind farm, located in the UK (6)
- 9. The international agreement signed in 2015 to combat global warming (11)
- 11. The region at which ONGC Energy Centre has taken first step towards putting India on Geothermal map of the World(10)
- 12. Geothermal energy comes from this layer of the Earth(6)
- 15. Term for the maximum efficiency limit of a solar cell, named after a scientist (16)
- 16. Frozen deposits of methane trapped under ocean floors and permafrost, a potential climate time bomb(16)
- 17. Fast-growing grass used as a renewable biofuel source (6)
- 19. A feedback loop where melting ice reduces Earth’s reflectivity, worsening warming (12)
- 20. A colorless, odorless gas that could be a future clean fuel alternative(8)
- 21. A nuclear reaction that has the potential to provide nearly limitless clean energy (6)
Down
- 1. The process of converting waste into usable energy (17)
- 2. Building feature that keeps heat in and cold out(10)
- 3. Behavioral practice of adjusting heating and cooling to reduce power usage(14)
- 4. Primary greenhouse gas responsible for ocean acidification(12)
- 6. A practice of capturing and storing atmospheric CO₂ to mitigate climate change (15)
- 8. Term for the abrupt and irreversible shifts in the climate system (12)
- 10. Type of hydropower that does not require large dams and works in small rivers (10)
- 13. Renewable fuel made from organic materials(7)
- 14. A method of reducing urban heat by using vegetation-covered rooftops (12)
- 17. Mode of transportation that reduces carbon footprint(7)
- 18. Rare earth element essential for wind turbine magnets and electric vehicle motors (9)