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2.land within urban areas that is set aside for scenic and recreational enjoyment, such as City Park or Town Point Park
6.problem in Haiti due to too many trees being cut down than can be replaced
7.long-term Pacific Ocean change in warm and cold water masses; occurs 20-30 years
9.when rain occurs on one side of the mountain but not the other
11.how much water flows through soil
12.when atoms split; atomic bomb utilized this
14.location of good ozone
15.layer of solid rock
19.water that is drinkable
24.winds that blow predominantly in one direction
27.human activity or climate change make arid (dry) areas more desert-like; this happened to Lake Chad
29.area of open land often used for farming
30.this describes a crop that can be produced in a large amount with little negative impact on the environment
32.krill eat a small amount of DDT; small fish eat many krill increasing the DDT in the small fish; DDT is greatest at the level of a bird eating a large fish
34.cutting down only mature or dying trees
35.layer of the thermosphere where ions can emit photons of light known as aurora borealis or australias
37.there are about 50 species of animals that have been raised for human use or consumption
38.oil, petroleum, coal; nonrenewable resources
39.converts mechanical energy into electrical energy
40.movement of warmth by wind
41.area in which water travels downward to add to an aquifer
42.coldest layer of the ozone
43.virus or microorganism that causes disease
1.mixture of decomposing organic matter used as a fertilizer and soil conditioner; guy on Bill Nye video had a toilet that collected this
3.raising aquatic organisms for human use or consumption
4.site of world's worst nuclear reactor accident in the Ukraine in 1986
5.planting crops with the flow of the shape of the land; helps prevent erosion
6.saves on 80% of water lost in normal spray irrigation
8.the basic facilities of a country or region, such as roads, bridges, sewers, and hospitals
10.how many spaces soil has
13.transfer of heat energy to an object
16.scenic or recreational space that is left in its natural condition
17.layer of soil with organic matter, living organisms, and rock particles
18.accumulation of salts in soil; problem in California
20.warm phase of ENSO in Pacific Ocean in which surface-water temperature becomes unusually warm
21.when atoms fuse together
22.warming of the surface and lower atmosphere of Earth that occurs when carbon dioxide, water vapor, and other gases absorb UV rays
23.area in city where temperature is higher than in surrounding rural areas
25.this group of people were hurt during the green revolution because they couldn't keep up with the new technology of farming
26.period that started in the 1970's: greater crop variety, more technology, and more chemicals, such as fertilizers
28.land that can be farmed
31.last true layer of the atmosphere where both ions and satellites are (distinguished in two recognized layers)
33.a multitude of people move into cities because more jobs are there
36.distance north and south of equator; seasons and daylight change further from the equator

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