<span>A. It established federal emissions standards
</span>The enactment of the Clean Air Act of 1970 (1970 CAA) resulted in a major shift in the federal government's role in air pollution<span> control. This legislation authorized the development of comprehensive federal and state regulations to limit </span>emissions<span> from both stationary (industrial) sources and mobile sources.</span>
The rainfall of 30-50 inches of rainfall every year affect the people who live there as in such a way that, families are typically very large, so there are always enough workers to search for water to bring back for cooking, cleaning, and farming.
Option D
<h3><u>Explanation:</u></h3>
In Africa's Savannah region the water scarcity is quite high. People out there work very hard to collect even small amount of water. As we all know water is the most basic and essential for survival. In Savannah due to the low rainfall and highly dry climate the water level is very low.
People has to go miles away in search of water. That’s why families are very large there so that the members can help each other in arranging all the essentials and water for living in the region.
Ecologycal type thinking will increase people tendency in consuming organic based diet and reduced their consumption of man-made chemicals.
This will lead to the reduction in overall consumption of sugar (which is the mainn cause of diabetes) and will also lower Average body mass index in our society.
