Sustainable energy is the equivalent of the U.S. moon shot.

I also developed an interest in sports, and played in informal games at a nearby school yard where the neighborhood children met to play touch football, baseball, basketball and occasionally, ice hockey.

Since I walked in the door as secretary of energy, I've been doing everything in our powers to do what we can to reduce these gas prices. ... So, of course we don't want the price of gasoline to go up; we want it to go down.

While we cannot accurately predict the course of climate change in the coming decades, the risks we run if we don't change our course are enormous. Prudent risk management does not equate uncertainty with inaction.

However, when my parents married in 1945, China was in turmoil and the possibility of returning grew increasingly remote, and they decided to begin their family in the United States.

Somehow we have to figure out how to boost the price of gasoline to the levels in Europe.

By the fourth grade, I graduated to an erector set and spent many happy hours constructing devices of unknown purpose where the main design criterion was to maximize the number of moving parts and overall size.