Answer: a. The national government instituted regulations to handle environmental issues.
The 1960s and 1970s were a period of increased awareness about environmental issues among the population. One of the catalysts was the book <em>Silent Spring</em> (1962) by Rachel Carson. The book discussed the negative effects of pesticides, in particular DDT, on wildlife. The 1969 Santa Barbara oil spill also generated public outrage. As a result, many regulations were passed in order to protect the environment. Moreover, those that already existed were reviewed and rewritten to make them more comprehensive.
The Mongol Empire existed during the 13th and 14th centuries and it is recognized as being the largest contiguous land empire in history! Thank you hope this helps! :)
The Sumerians and other civilization carry out the aspects of creation mandate in the reason that they filled the earth and used the resources God had given them. They use the resources that only God can give them and they also filled the earth.