When burned, these fossil fuels emit harmful gases including carbon dioxide and sulfur dioxide which increase the amount of greenhouse gases in the atmosphere resulting in global warming. Air pollution is much worse in highly populated cities where more factories emit pollution in close proximity to humans.
George Washington was the first to hold office (first president)
Barack obama was the first black president
On July 4, 1776, the Declaration of Independence developed
The U.S is the 4th largest country in the world
The U.S is the 3rd country with most population
They were African Americans who spoke and wrote in favor of abolition. hope this helps :)
