Union of Concerned Scientists
The Union of Concerned Scientists is an advocacy organization that conducts rigorous, independent scientific research to help solve our planet’s most pressing problems. Their main focus areas are clean energy, clean vehicles, food, global warming, nuclear power, and nuclear weapons. The organization has over 500,000 supporters. Their website offers in-depth information on all of the campaigns that are underway and you can easily get involved by instantly sending letters to legislators and decision makers using prefilled email forms.