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.
long-term effect of increasing carbon emissions.
long-term effect of decreasing temperatures.
short-term effect of decreasing the use of new
technology.
short-term effect of increasing energy demands.