This excerpt primarily describes the Read the excerpt from "Climate Change: An
Overview."
By the early twentieth century, carbon emissions from
fossil-fuel burning reached 1 billion tons a year.
Automobiles, airplanes, and domestic and agricultural
energy demands all contributed to the rising trend. In
the 1950s, scientists used a new generation of
equipment to confirm that carbon dioxide
concentrations were doubling and that this would
have the effect of increased temperatures.
O long-term effect of increasing carbon emissions.
O long-term effect of decreasing temperatures.
O short-term effect of decreasing the use of new
technology
O short-term effect of increasing energy demands.