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Energy Sources Crossword Puzzle

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Energy Sources

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                10         11                                
          12             13                                  
                          17           18           19        
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4 materials or substances such as minerals, forests, water, and fertile land that occur in nature and can be used for economic gain.
5 when pollutants are directly or indirectly discharged into water
6 substance of economic value that can be replaced or replenished in the same or less amount of time as it takes to draw the supply down
7 to separate particles
8 the process by which fertile land becomes desert, typically caused by drought
9 anything of material value
11 a process in which the value of the biophysical environment is affected by a combination of human-induced processes acting upon the land
13 the trapping of the sun's warmth in a planet's lower atmosphere
14 to generate electricity based on natural conditions and circumstances
16 causes a dense growth of plant life and death of animal life from lack of oxygen.
17 when chemicals are released into our environment and disrupts the balance of our ecosystems
1 a natural fuel such as coal or gas, formed in the geological past from the remains of living organisms.
2 fog or haze combined with smoke and other atmospheric pollutants.
3 to conserve something
4 a resource of economic value that cannot be readily replaced by natural means on a level equal to its consumption.
10 rainfall made sufficiently acidic by atmospheric pollution that it causes environmental harm
12 the care of something
15 the clearing of trees, transforming a forest into cleared land
18 the presence in or introduction into the air of a substance which has harmful or poisonous effects.
19 becoming more like a city
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