The Nile River
The Tigris and Euphrates Rivers
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Answer:
Humans cause change in the environment as there is overwhelming evidence that human activities, especially burning fossil fuels, are leading to increased levels of carbon dioxide and other greenhouse gases in the atmosphere, which in turn amplify the natural greenhouse effect, causing the temperature of the Earth's atmosphere, ocean, and land surface to increase. That greenhouse gases "trap" infrared heat is well established through laboratory experiments going back to 1856 when Eunice Foote first measured the effect.The well-documented trend of increasing of CO2 in the atmosphere is caused by the burning of fossil fuels and massive land cover changes. The "smoking gun" that shows clearly that human activities are responsible for recent increases in carbon dioxide in the atmosphere is provided by carbon isotopes (carbon atoms of different atomic weight). These isotopes allow scientists to "fingerprint" the source of the carbon dioxide molecules, which reveal that the increased CO2 in the atmosphere is caused by fossil fuel burning also.
It all began like 5 million years ago, from just one cell. This cell then merged with other communities to a multicellular being, and the same evolution continued till the formation of the apes. Then Natural selection (Adaption of an organism in his environment to survive) continued this evolution over million years, till the apparition of the Homo Sapiens, or as known today, the Humans.
Some Scientifics say that the first known human Ancestor is Lucy, is 3.2 million years old fossil found in Ethiopia in 1974.
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Answer:
they found colonies in mich if eastern America in a number of Caribbean island
True it does mark the beginning of metallurgy
