Gasaholics Anonymous

If you haven't switched to biodiesel yet, you may want to consider you choice of gas station based on their ethical prinicples. Here are the best through worst options according to Co-op America:

BEST OPTIONS

BP: Recently named a climate leader by CERES, a nationally renowned network of investment funds, environmental organizations, and other public interest groups working to advance environmental stewardship on the part of businesses. BP also has made significant planned investment in solar energy.

Sunoco: Sunoco is the only big oil company to endorse the CERES Principles for environmentally sustainable business. Sunoco reportedly does not buy oil from the Middle East.

CITGO: CITGO is the US arm of Petróleos de Venezuela S.A. (PDVSA), a world energy corporation owned by the Venezuelan State. CITGO donated home heating oil to low-income families in several US states this winter, though their efforts were attacked by Congress.

BETTER OPTION

Shell: Shell has agreed to report on its social and environmental impact using the Global Reporting Initiative guidelines. Learn more about the GRI.

WORST OPTIONS

Chevron: Chevron has a long record of environmental and human rights violations in countries it sources from. In April 2006, shareholders called for Chevron to develop a verifiable human rights policy.

Exxon: Exxon was named a climate laggard by CERES. Exxon is the target of international campaigns such as Campaign ExxonMobil, Exxpose Exxon, and more.