<span>Those who were born on foreign soil now constitute about "10 %" of the US population.
According to PEW research center report there has been an increase in this number and it is likely that this number breaks a 125 years record within the next decade.</span>
Native Americans fought on both sides of the Civil War (Union and Confederate) fearing being on the losing side would damage and lose their way of life.
(A) The war caused Native American tribes to sign treaties and side with Union forces who promised to help develop Indian territory
(E) The War led Native American tribes to sign treaties with the Confederacy, which promised to protect the tribes and their interests in exchange for support in the war.
The second alternative is correct (B).
The economic matrix in force in the world is based on the burning of fossil fuels, mainly petroleum, which releases amounts of CO2 and other gases in the ozone layer.
The acid rain is due to the exaggerated amount of products from the burning of fossil fuels released into the atmosphere. That is, human activities are mainly responsible for this phenomenon of acid rain.
Thus, the change to a clean energy matrix, using solar, wind and other energy, can result in a decrease in the phenomenon of acid rain.
