Answer:
use bigger dams,
the underground system clear
make sponge city
The equator and prime meridian meet closet to the continent of Africa.
Hope this helps! XD :)
Answer:
These were the people the European explorers met when their ships landed in America. Europeans were used to these diseases, but Indian people had no resistance to them. Sometimes the illnesses spread through direct contact with colonists. Other times, they were transmitted as Indians traded with one another.
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Can you please put your question in English?