Environmental Awareness in the U.S.A. began in the 1970s with the formation of the Environmental Protection Agency (EPA). The organization was formed by President Richard Nixon to help the government learn more about our impact on the environment, and in turn how the environment affects us.
Throughout the 90s and 00s, the EPA has passed many acts and guidelines that are working to help protect our environment. In 1990, 2 major pieces of legislation were put forth by the EPA: The Clean Air Act Amendments, and the Pollution Prevention Act. In 1996, the Safe Drinking Water Act Amendments were passed. The EPA implemented the Food Quality Act in 1997. (More information on the EPA's history is available here)
All of these acts have been extremely important in making our nation more environmentally aware, and therefore more environmentally friendly. It has been proven time and time again that the benefits of EPA efforts far out weigh the costs. The new effort to "go green" is something that my parent's generation never had, and therefore will never benefit from. That is why I feel very fortunate to experience America's effort to protect the environment in my lifetime.