Answer:
because of the Europeans and they left their land to join the another native American something like that
In "An inconvenient truth", Al Gore states that the level of atmospheric carbon dioxide goes up and down every year. When it's summer in the northern hemisphere, where there is the majority of the vegetation " the leaves come out and they breathe in the carbon dioxide and the amount in the atmosphere goes down". On the winter the vegetation exhales carbon dioxide and so the levels increase. This is what a college professor of him found out. He started making these measurements in 1958. By the middle sixties, when the teacher shown Al Gore's class, the graphic showed clearly that the levels were going up.
The chemical compounds of living things are known as the organic compounds because of there association with organisms. Organic compounds, which are compounds associated with life processes, are the subject matter of organic chemistry. <span />
This is a line in Laurence Shames’ “The More Factor.” In this essay, Shames argues that Americans have always valued the idea of having “more”. He states that this was intrinsic to the development of the nation during the years of the Wild West. People wanted more land, more riches, and were prepared to sacrifice everything in order to obtain it. He also argues that this desire for “more” has meant that Americans have forgotten about other values, concentrating on quantity instead of quality.
Shames also argues that the idea of “open space,” of unlimited land that could be grabbed, generated ambition, but it also generated a metaphor. That is, a metaphor of unlimited potential and growth. This metaphor is still associated with the idea of “conquering frontiers.” However, he argues that as hopes of growth are now put on the economy, we have to realize that growth is finite, and that we need to reexamine our values and future goals for the country.