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

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1. Coal.
2. how much carbon dioxide is emitted by each source.
3. how to maximize the use of  clean sources of energy. 

The primary concern for future generations in considering the sources of energy is sustainability.

Sources of energy

Energy is a very important driver of development in the twenty first century. The graph showing energy sources is not shown in this question but I will try to help you the much I can.

You must note that sustainability is the primary concern for future generations in considering the sources of energy to minimize environmental degradation.

Learn more about energy sources: https://brainly.com/question/6533148