This pie chart shows several ways that the United States made electricity in 2009. The chart shows that was the main source of energy used in power plants. To understand this chart in terms of climate change, scientists need to find out
. For future generations, they also need to think about
.

on passing the small ampere of electric current through the tube made of ar and hg of cfl generates uv rays which excites the fluorescent and thus emits the high radiation by consumption of just 5- 12 w in comparison to incandescent light which requires more power such as around 40 - 55 w to lighten.

moreover the life span of fluorescent or cfl is around 8000 h whereas the life span of incandescent is around 1200 h

hence, the building installed with incandescent lights bears more electricity bill.