1) Today our muscles suppply what percentage of work done? What was this percent

ID: 913649 • Letter: 1

Question

1) Today our muscles suppply what percentage of work done?

What was this percentage in 1950? What was this percentage in 1800? What was this percentage 5 million years ago?

2) Describe a way to produce energy that causes no environmental harm.

3) Who supplies your electricity? What alternative choices do you have?

4) Why has the industrial world's per capita use of energy remained about the same in the past decade even though the world's economy has increased?

5) The amount of energy used depends on what two factors? Give some additional examples of each?

6) What are fossils?

7) What are fossil fuels?

8) List all fossil fuels

9) List 10 ways you used energy today to make your life easier, better.

10) How great a connection do you believe there is between us obtaining the energy we want and war?

2) There are many types of ways to produce energy that causes no enviromental harm like solar energy or eolic energy.

3) The electricity is supply by differents types of industries like, petrochemical industry, hydrodynamic and others, The alternaive is solar energy.

6) A fossil is the naturally preserved remains or traces of animals or plants that lived in the geologic past

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