During photosynthesis, a chemical called chlorophyll absorbs the light energy and encourages a reaction between carbon dioxide and water that results in glucose and oxygen. Oxygen is expelled as a waste product from the plant, and it enters the atmosphere.
The EPA was proposed by President Richard Nixon and began operation on December 2, 1970, after Nixon signed an executive order. The order establishing the EPA was ratified by committee hearings in the House and Senate. The agency is led by its Administrator, who is appointed by the president and approved by Congress.
Vietnamization and the Nixon Doctrine. When President Richard M. Nixon took office in January 1969, he chose former political science professor Henry A. Kissinger as his national security advisor. Kissinger saw Vietnam as a mistake and pushed for disengagement. Not long into his term, Nixon announced a new policy of Vietnamization to gradually withdraw the more than 500, 000 American soldiers from Vietnam and return control of the war to the South Vietnamese ARVN.