Between 1931 and 1940 a ton of soil blew out of the central and southern great. It was a period of severe dust storms that greatly damaged the ecology and agriculture during the 1930s.
<span> What substance was responsible for a major ozone depletion in the 1900s? </span>
<span>In the 1920s, CFCs were invented and widely used because they were not too expensive, and were inflammable. By the 1990s, they were banned because they depleted ozone, and the only place Nature could destroy them was the intense solar radiation in the ozone layer. </span>
It’s was caused by the volcanic mountain
Answer:
A. Evolution
Explanation:
Human resources is the set of the people who make up the workforce of an organization, business sector, industry, or economy.
Birth is directly proportional to the human resources .
Death is inversely proportional to the human resources and same as Emigration.
