The Union of Concerned Scientists is a leading science-based nonprofit working for a healthy environment and a safer world.  UCS combines independent scientific research and citizen action to develop innovative, practical solutions and to secure responsible changes in government policy, corporate practices, and consumer choices.  UCS stands out among nonprofit organizations as the reliable source for independent scientific analysis.  Their scientists and policy experts are highly respected in both Washington, DC, and state capitals, and are frequently called to testify before government committees.  From global warming and nuclear weapons to clean vehicles and genetically engineered food crops, UCS provides sensible, feasible solutions that will protect and improve the health and safety of our environment and our communities.