Watt's That Junior

Here's the answer to our $50 question:

A hundred years ago, 30 percent of the people in Pasadena, California used this to heat their water. What was it?

2. The sun.

CONGRATULATIONS! You got that one correct! You won $50!!!

Solar energy is not a new idea! People in California -- and other sunny parts of the United States -- heated water with the heat of the sun in the 1890's.

Now choose a new question.