solar energy |
1,500,000/mo |
$4.09 |
solar power |
1,830,000/mo |
$3.38 |
biodiesel |
1,220,000/mo |
$1.57 |
wind power |
823,000/mo |
$2.46 |
wind energy |
823,000/mo |
$2.74 |
ethanol |
4,090,000/mo |
$1.72 |
biomass |
823,000/mo |
$2.10 |
greenhouse effect |
301,000/mo |
$0.95 |
windmills |
823,000/mo |
$1.64 |
wind turbines |
1,830,000/mo |
$2.35 |
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renewable energy |
1,220,000/mo |
$5.32 |
wind generator |
673,000/mo |
$2.32 |
wind generators |
823,000/mo |
$2.30 |
climate change |
2,240,000/mo |
$1.15 |
environmental pollution |
246,000/mo |
$0.99 |
solar electricity |
673,000/mo |
$4.64 |
energy conservation |
301,000/mo |
$4.22 |
greenhouse gases |
246,000/mo |
$2.31 |
solar electric |
550,000/mo |
$4.57 |
biofuel |
823,000/mo |
$1.76 |
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