global warming |
2,740,000/mo |
$1.17 |
solar energy |
1,500,000/mo |
$4.09 |
energy |
55,600,000/mo |
$2.04 |
wind energy |
823,000/mo |
$2.74 |
windmills |
823,000/mo |
$1.64 |
wind turbines |
1,830,000/mo |
$2.35 |
renewable energy |
1,220,000/mo |
$5.32 |
ecosystem |
1,500,000/mo |
$0.87 |
climate |
55,600,000/mo |
$0.60 |
natural resources |
1,220,000/mo |
$0.85 |
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ecosystems |
1,000,000/mo |
$0.67 |
effects of global warming |
246,000/mo |
$1.18 |
carbon dioxide |
2,740,000/mo |
$1.77 |
environmental |
11,100,000/mo |
$2.68 |
climate change |
2,240,000/mo |
$1.15 |
sustainable development |
550,000/mo |
$5.31 |
energy conservation |
301,000/mo |
$4.22 |
environmental issues |
450,000/mo |
$1.40 |
breast cancer facts |
18,100/mo |
$1.92 |
air pollution facts |
12,100/mo |
$0.78 |
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