Your Questions About Sustainable Energy

How long would the sun last if it was the size of a baseball?

Is it possible to replicate the sun on small scales and produce sustainable energy. How long would it last if it was the size of a baseball?

What is the single most important issue that faces the United States in the global arena?

What is the single most important issue that faces the United States in the global arena?
Does climate change and sustainable energy development answer this question?

Anybody want to explain how climate change and sustainable energy development is the single most important issue that faces the United States in the global arena?

If not, what do you think is the most important issue? Why?