What ere the best topics for investigatory projects?

about in physical science

Answer:
1.Using the existing peer reviewed literature estimate the contribution to Global Warming made by human activity and estimate the contribution made by natural processes.

2. Estimate the total amount in tons of radioactive Uranium and Thorium that are in the amount of coal that is burned each year in the United States.

3. Estimate the amount of radioactive Radon gas that is released to the atmosphere each year from the radioactive Uranium in ash from coal fired powerplants.
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