Answer:
European colonizers killed so many indigenous Americans that the planet cooled down, a group of researchers concluded. Following Christopher Columbus' arrival in North America in 1492, violence and disease killed 90% of the indigenous population — nearly 55 million people — according to a study published this year.
Explanation:
The answer above me is correct
Answer: changes during the Neolithic Revolution
Explanation: 4
flora and fauna
this isn't needed < 20 word thing
