| air pollution |
1,000,000/mo |
$1.21 |
| electric cars |
673,000/mo |
$2.72 |
| open source |
4,090,000/mo |
$6.67 |
| crude oil |
1,000,000/mo |
$1.25 |
| green houses |
246,000/mo |
$1.45 |
| biogas |
823,000/mo |
$2.01 |
| crude oil prices |
246,000/mo |
$0.56 |
| electric powered cars |
8,100/mo |
$2.13 |
| ethanol producers |
22,200/mo |
$1.65 |
| air pollution effects |
90,500/mo |
$1.18 |
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