Week14

Topic:The two graphs show the main sources of energy in the USA in the 1980s and the 1990s.
The two graphs show the main sources of energy in the USA in the 1980s and the 1990s. We can see the main source of energy was the oil in 1980. In 1980, we also can see the nuclear power and the hydroelectric power were the less source of energy in 1990.

But the rate of source of energy in the USA had the change in 1990. We can see the main source of energy was still the oil but the rate of it drops nine percents in 1990. And he natural also drop one percent. In addition, the nuclear power and the coal increase five percents of the rate. The hydroelectric was changeless in 1980 or 1990.

In the end, we can know that the oil and the natural gas became decreasing in 1990. But the coal and the nuclear power became increasing in 1980. Besides, the hydroelectric power didn’t change the rate.