Environmental legislation in the U.S. is a large topic, encompassing regulation of many aspects of the air, water, and land use.
With the increase in attention to global warming, carbon emissions have become a major target of government regulation both in the US and abroad.
US Environmental Legislation has often encouraged alternative fuels that have a smaller impact on the environment and are perceived as "green." These often Renewable Energy Sources include Corn, switch grass, wood fibers and many others.
Through the Clean Water Act and subsequent Supreme Court decisions, the United States Government is able to claim jurisdiction over the regulation of "Waters of the US" - a term that has come to encompass wetland areas defined by certain hydrological and vegetative characteristics. The Army Corp. of Engineers serves as the federal government's primary regulator of these waters, and must review any development plans that propose to disturb a wetland area. Although this regulation theoretically hinders certain types of commercial activity in coastal areas, it does serve as a barrier to entry and a source of land value preservation. Home builders attempting to do business in coastal areas face a lengthy regulatory approval process prior to receiving permission to commence construction. Those who are able to do so should benefit from the scarcity that wetland regulation encourages.