<Li> Region 10: responsible within the states of Alaska, Idaho, Oregon, and Washington . </Li> <P> Each regional office also implements programs on Indian Tribal lands, except those programs delegated to tribal authorities . </P> <P> The laws below are general environmental protection measures, and may also apply to other units of the government, including the Department of the Interior and the Department of Agriculture . </P> <Ul> <Li> 1955: Air Pollution Control Act PL 84 - 159 </Li> <Li> 1963: Clean Air Act PL 88 - 206 </Li> <Li> 1965: Motor Vehicle Air Pollution Control Act PL 89 - 272 </Li> <Li> 1966: Clean Air Act Amendments PL 89 - 675 </Li> <Li> 1967: Air Quality Act PL 90 - 148 </Li> <Li> 1970: Clean Air Act Extension PL 91 - 604 </Li> <Li> 1977: Clean Air Act Amendments PL 95 - 95 </Li> <Li> 1990: Clean Air Act Amendments PL 101 - 549 </Li> </Ul>

What part of the government oversees monitoring them in the environment