Earth Day Crossword Puzzle

ACROSS CLUES

1. To use again, one of the 3 R's of waste reduction: Reduce, _____, Recycle.

3. It's tall, has a wood trunk and absorbs carbon dioxide.

4. Abbreviation for air conditioning, which we should turn down to conserve energy

6. To purchase - "To reduce waste don't ___ things you don't really need or want."

7. Solar power uses energy from this.

9. Abbreviation for the country where the first Earth Day took place on April 22, 1970.

10. Source of energy - "Burning a fossil ____ such as coal uses a non-renewable resource and produces pollutants and greenhouse gases."

12. Able to be used over and over again without being used up - "Solar and wind power are _________ energy sources."

13. Our planet

6. The color of the sky, unless the air is polluted

7. Related to the sun - "_____ energy is clean and renewable."

8. Related to the nucleus or center of the atom - "_______ power plants use the heat produced when the nucleus of an atom splits."

10. Like a friend - "When you reduce, reuse, and recycle, you are being environmentally ________."

11. Power - "Coal, oil and gas are non-renewable _____ sources."

14. Moving air - "Windmills use clean, renewable ____ energy to produce electricity."

17. Attempt - "___ to use environmentally friendly products."

18. Prefix that means "related to the Earth" - "___thermal power comes from the Earth's heat or thermal energy."

20. Abbreviation for United States - "__ Senator Gaylord Nelson was the founder of Earth Day."

14. Hot, but not extremely hot - "Greenhouse gases prevent heat from escaping, causing the Earth to ____."

15. It's all around us, we breathe it, and so we should be careful not to pollute it.

16. Opposite of NIGHT

19. To lessen, the first of the 3 R's of waste reduction: ______, Reuse, Recycle.

DOWN CLUES

1. To repeat a cycle or sequence of events and one of the 3 R's of waste reduction: Reduce, Reuse, _______.

2. Abbreviation for United Nations - "the 1972 __ Conference on the Human Environment in Stockholm"

5. A fossil fuel that looks like black rock