美国是较早推行绿色采购的国家,其绿色采购的法律依据是联邦的各项法律法规及总统令。1991年发布的总统令规定政府必须优先采购绿色产品。1993年,美国总统克林顿签署总统令,规定联邦政府机构必须采购“能源之星”标志产品,从而极大地促进了“能源之星”标志制度的发展,并使其成为国际节能基准。目前,美国95%的监视器、80%的电脑均符合“能源之星”标准。 The United States is the earlier country to promote green procurement, the legal basis for its green procurement is the federal laws and regulations and presidential decree. The 1991 presidential decree stipulates that the government must give priority to purchasing green products. In 1993, President Bill Clinton signed a presidential decree that requires federal agencies to procure “Energy Star” signage products, which have greatly facilitated the development of the “Energy Star” sign system and made it an international energy efficiency benchmark . At present, 95% of the monitors in the United States and 80% of computers comply with the “Energy Star” standard.