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What we need to do is really improve energy efficiency standards, develop in full scale renewable and alternative energy and use the one resource we have in abundance, our creativity.

The source of all the energy is the sun. The big challenge is, how do you use all of that energy? Solar power has to fascinate you. There have been strides to get the costs down, and if this will work, you have to get costs down so it is competitive with fossil fuels.

We need to develop clean, affordable, and reliable energy sources, and frankly, we need to license that technology to the rest of the world.

Almost every way we make electricity today, except for the emerging renewables and nuclear, puts out CO2. And so, what we're going to have to do at a global scale, is create a new system. And so, we need energy miracles.

Solar power is going to be absolutely essential to meeting growing energy demands while staving off climate change.

Solar power, wind power, the way forward is to collaborate with nature - it's the only way we are going to get to the other end of the 21st century.

We ought to open up energy innovation across the board and - and remove the barriers to every form of energy.

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

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.

We need to invest dramatically in green energy, making solar panels so cheap that everybody wants them. Nobody wanted to buy a computer in 1950, but once they got cheap, everyone bought them.