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We need to bring sustainable energy to every corner of the globe with technologies like solar energy mini-grids, solar powered lights, and wind turbines.

Consumers used to think they had to compromise with solar. It was, 'Okay, I'm doing the right thing for the environment; it's cool to see the panels. I have to compromise on the cost and convenience side.' And now they no longer have to. On the cost side, it's cheaper, and on the convenience side, we set it all up.

There's 20 companies that I have investments in - some batteries, some solar-thermal, one big nuclear thing. We need hundreds and hundreds of companies like that, so that in a 20-year time frame we really are starting to change the energy infrastructure.

Every day we are paying more for energy than we should due to poor insulation, inefficient lights, appliances, and heating and cooling equipment - money we could save by investing in energy efficiency.

Solar power is clean, renewable and cost effective, but it also needs time to develop.

I'm an advocate for a full spectrum of energy policy, but we're never going to get there with solar cells that are going to power this country.

Windmills and solar cells are carbon-free sources of electricity. But they are costly. If you've been investing in those, give it up. That game is effectively over.

Today, we're very dependent on cheap energy. We just take it for granted - all the things you have in the house, the way industry works.

Battering down solar cells on the roofs of Wal-Marts in California. I think that will be some of the highest-return investments that anyone ever makes.

If we are serious about moving toward energy independence in a cost-effective way, we should invest in solar energy. If we are serious about cutting air and water pollution and reducing greenhouse gas emissions, we should invest in solar energy.