美国林业局最近规定,一年半之内不在国家森林区内修建任何公路。林业局负责总面积为7800万公顷的森林,相当于美国中西部的伊利诺斯、衣阿华、密西根、明尼苏达和威斯康星等五个州面积的总和。这项临时禁令,是为了保护1300万公顷的森林不会由于砍伐和其他娱乐工程而被毁坏。以后还会制定永久性的计划。 The United States Forestry Administration recently stipulated that within one and a half years no roads should be built in the national forest area. The Forestry Department is responsible for a total area of ​​78 million hectares of forest, equivalent to the sum of the five states of Illinois, Iowa, Michigan, Minnesota and Wisconsin in the Midwestern United States. This temporary ban is designed to protect 13 million hectares of forest from being destroyed by logging and other recreational activities. Future plans will be made.