Because the big oil companies make sure we don't move to alternative energy sources.

He wrote several books on nuclear power and alternative energy sources.

But it does seem to be yet another really good idea for alternative energy sources.

He has put this into practice by using alternative energy sources for his official car.

Wind power has been the leading alternative energy source in recent years.

We are falling behind in alternative energy source research and production, which is a national security issue.

There will also be joint development of alternative energy sources.

We should set the course to expand alternative energy sources.

There is simply no economic and practical alternative energy source.

The alternative energy source is the company's most important asset for future growth.

We have yet to make the most of conservation and alternative energy sources.

A little while ago, a customer came in and we started talking about alternative energy sources.

Of course, other approaches including support for alternative energy sources can make a difference, but not enough.

We should consider the impact of manufacturing alternative energy sources.

The answer is simple: those alternative energy sources cost more than the benefits that they produce.

The potential for alternative energy sources has not been exploited at all.

It is far more important to examine alternative energy sources in these countries.

Lawmakers have also shown little interest in the development of alternative energy sources.

The message board will be giving out green messages about alternative energy sources.

His general focus was on trying to find alternative energy sources in the face of rising gas prices.

Record prices will also spur development of alternative energy sources, he said.

Since the start of this administration, the federal government has spent more than $12 billion to research, develop and promote alternative energy sources.

However, the high oil prices do seem to be stimulating interest in alternative energy sources.

I am interested in learning more about renewable and alternative energy sources.

Consider the financial and ecological factors involved in these alternative energy sources.