Question

2. How many years ago, major changes in the environment took place? ​

Answer 1

Answer:

It is believed that 12,000 years ago a major change took place in the world’s environment. The earth’s temperature began to gradually increase. This led to the development of grasslands in many places. Birds and animals began to multiply in unprecedented numbers. Animals like deer, elks, goats, sheep and others prospered in these grasslands.

Explanation:

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Answer 2

12,000 Years Ago, Humans and Climate Change Made a Deadly Team. Climate change, habitat destruction, extinctions — the Earth has seen it all before, thousands of years ago.Global temperature has risen six-tenths of a degree in those 20 years. Population has increased by 1.7 billion people. Sea levels have risen 3 inches and extreme weather in the U.S. has increased by 30 percent. In Greenland and Antarctica, ice sheets have lost 4.9 trillion tons of ice

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