At the North American International Auto Show in Detroit this week, it's not all hybrids and battery-powered cars. Some car companies are making significant investments in a fuel that's not new at all — diesel.
The newest diesel engines are far cleaner than their predecessors, and they get many more miles per gallon. The question is, what's holding customers back from switching gas pumps?
When you look around the auto show, there's a lot of energy and there's a lot of money being spent again. The one topic that keeps coming up, of course, is fuel economy.
Like other animals and many living things, we humans grow when we're young and then stop growing once we mature. But trees, it turns out, are an exception to this general rule. In fact, scientists have discovered that trees grow faster the older they get.
Once trees reach a certain height, they do stop getting taller. So many foresters figured that tree growth — and girth — also slowed with age.
Florida may soon become the latest state to allow doctors to prescribe marijuana. Advocates there are gathering signatures to put a medical marijuana referendum on the fall ballot.
But Florida's Legislature may act sooner to allow residents access to a particular type of marijuana. Advocates say the strain called Charlotte's Web offers hope to children with severe seizure disorders.