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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.

I think that inexpensive sources of planet-friendly energy are one of the most important things for us to pursue.

We have to slow down the emissions of carbon dioxide and methane from coal burning, oil and eventually natural gas... And the best ways to do that are energy efficiency and a switch to renewables.

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.

We already have many of the technologies and tools that we need to build a sustainable future. What we don't have is a new way of thinking, and that's really the hardest part.

Solar will outcompete other technologies.

I feel the 21st century is another new age. Not only can we collaborate again with nature, but we have to. It's an emergency.

Wind and other clean, renewable energy will help end our reliance on fossil fuels and combat the severe threat that climate change poses to humans and wildlife alike.

Energy is one topic on which different countries can work together collaboratively. If we can all produce energy from an element that's available in abundance on our planet, that would be a good thing, but we have to learn how to produce energy in large quantities, cheaply, efficiently and without detriment to the environment.

On energy, we should be exploring for domestic sources of energy.