Crossword Puzzle Clues

Across

1. The three “R”s that offer a guide to helping you lessen your impact on the environment and create a more sustainable world.

2. One of the factors that causes global warming, desertification, and loss of topsoil. It is often a result of poor management of natural resources.

3. The most abundant element in the universe. It can be used as a fuel source. 4. These plentiful and useful organisms consume carbon dioxide, convert it to food, and produce oxygen. 5. The program endorsed by the US Environment Protection Agency to reduce energy use mainly in

household appliances and heating and cooling units. 6. The most toxic greenhouse gas emission. It is common around landfills and farms. 7. It gives people the power to make environmental policy a priority – age 18. 8. The name given to gasses that trap heat and cause global warming. 9. A tool used to illustrate how much impact a human being has on the Earth. 10. A transportation vehicle using a combination of electricity and gasoline. 11. The most abundant energy source capable of being harnessed by humans. 12. It combines Hydrogen and Oxygen to create energy that can be used in cars. 13. The government agency which monitors environmental issues (acronym).

Down 1. Energy that can be used and reused an infinite number of times. 2. It was started in 1970 by Senator Gaylord Nelson and Dennis Hayes. It is celebrated by over 500

million people around the globe on April 22 every year. 3. Living within the limits of earth’s natural resources. 4. The term given to food sold in supermarkets and grown or fed without synthetic fertilizers, chemicals,

hormones, and antibiotics. 5. The type of fuel humans depend on most. It is nonrenewable and found underground. 6. The cleanest fossil fuel, most often found in fragile areas of nature. 7. The most common greenhouse gas. Humans breathe it out and trees consume it 8. An international treaty giving countries a timeline to reduce their emissions of greenhouse gases. It has

not been signed by the United States. 9. Another name for buyers. They can influence what products are carried in stores. 10. The part of the earth’s atmosphere that repels the sun’s ultraviolet rays. 11. This important layer of dirt is essential for ensuring plant growth and its nutrients are retained by trees.

Over time, it is washed away by agriculture. 12. An interdependent community of organisms including plants, animals, water, air and the ground. 13. The most efficient form of transportation in terms of energy usage. It does not pollute.

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Crossword Puzzle

The answers to the Crossword Puzzle come from lessons in the Ecological Footprint curriculum unit, but here are some additional clues.

Rearrange the letters into words that fit the above clues. Across

1. ERYEUSCDCERLUERECE ____________________________________________

2. TESTONIFEDRAO ____________________________________________

3. DGRENYOH ____________________________________________

4. ESERT ____________________________________________

5. RGEYNE ASTR ____________________________________________

6. NHETEAM ____________________________________________

7. EOTV ____________________________________________

8. NOEERHUSGE ____________________________________________

9. GLCOOCALIE TROPITNFO ____________________________________________

10. YHRBDI ACR ____________________________________________

11. SLRAO YGNEER ____________________________________________

12. LEUF ELCL ____________________________________________

13. APE ____________________________________________

Down 1. WEAENBELR EGERYN ____________________________________________

2. TRAHE YDA ____________________________________________

3. STILABAUSNE ____________________________________________

4. NGACIRO ____________________________________________

5. SISLOF USLEF ____________________________________________

6. URLAANT AGS ____________________________________________

7. ROBNCA OXIIEDD ____________________________________________

8. YOTKO YRAETT ____________________________________________

9. UMSNOESRC ____________________________________________

10. NZOEO RAYEL ____________________________________________

11. TLPSOOI ____________________________________________

12. ETSSMEYCO ____________________________________________

13. LYCCEIB ____________________________________________

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Crossword Puzzle

Crossword Puzzle 1 4 1 2 3 7 2 5 6 8 3 4 9 5 6 7 10 8 9 11 12 10 11 13 12 13

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Crossword Puzzle

Crossword Puzzle Answers

R1 O4 R1 E D U C E R E2 U S3 E R E C Y C L E N A U G C7

E D2 E F5 O R E S T A T I O N6 A W O T T N A R A S H A I T B B S D I C K8 U O L I A N H3 Y D R O G E N T4 R E E S L Y A O A D E F B T L I N U L O G O E E E T A X R L R S I G S C9 E D Y O A E E5 N E R G Y S T A R S Y U M6 E T H A N E V7 O10 T E Z R G8 R E E N H O U S E N E

E9 C O L O G I C A L F O O T P R I N T11 A O E12 H10 Y B R I D C A R P C E S S11 O L A R E N E R G Y B13 O S I I Y F12 U E L C E L L S Y T C E13 P A L M E

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Crossword Puzzle

Crossword Puzzle Answers

Across

1. Reduce-Reuse-Recycle 2. Deforestation 3. Hydrogen 4. Trees 5. Energy Star 6. Methane 7. Vote 8. Greenhouse 9. Ecological Footprint 10. Hybrid Car 11. Solar Energy 12. Fuel Cell 13. EPA

Down

1. Renewable Energy 2. Earth Day 3. Sustainable 4. Organic 5. Fossil Fuels 6. Natural Gas 7. Carbon Dioxide 8. Kyoto Treaty 9. Consumers 10. Ozone Layer 11. Topsoil 12. Ecosystem 13. Bicycle