The following pie graphs show both the different sources of global electricity production in 2010 and the predicted sources for 2020. Summarize the given information by reporting the main features and making comparisions where relevant.

The two given graphs compare various sources of electricity production in two years, in 2010 and prediction in the future, 2020. According to the first pie chart, in 2010, gas and oil ranked the first place at 39%, followed by nuclear at about 25%. Coal was in the third which accounted for 17% and both hydropower and renewables took two last places which were at 17% and 8% respectively. In the next ten-year period, the chart showed the different future of producing electricity. It is clear that gas will have a significant decrease to 20%, while coal are predicted to increase sharply and will take the first place from gas and oil at 37%. On the other hand, both two sources are nuclear and hydropower will remain the same protportion of electricity compare to the year 2010. Meanwhile, renewables will reduce slightly with a gap of 3% to 5% in 2020. Overall, while coal had the biggest growth rates and became the largest source in the future, it seems that nuclear and gas and oil dropped sharply and letter cases remained at the same level.