$40 QUESTION -- Category: Going Places

Why is natural gas used to run some buses and cars today?

  1. It's a really cheap fuel.

  2. It's easy to get in most of the country, thanks to a huge network of pipelines.

  3. Both 1 and 2, and it burns up to 90 percent cleaner than gasoline- or diesel-powered engines.

Sorry! The correct answer is 3. Both 1 and 2, and it burns up to 90 percent cleaner than gasoline- or diesel-powered engines.

Your opponent gets to choose.