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I think the cost of energy will come down when we make this transition to renewable energy.

You could power America with renewables from a technical and economic standpoint. The biggest obstacles are social and political - what you need is the will to do it.

There are signs jobs will be plentiful in the future, if we train and prepare for it. That means investing in technology, innovation, and, as much as Republicans will hate to hear this, renewable energy.

Addressing climate change and positioning the United States as the leader in advanced energy should be a top priority for our country and our economy, and I applaud the Obama administration for the steps it is taking.

First, by 2020, North America will be energy independent by taking full advantage of our oil and coal and gas and nuclear and renewables.

It is time for a New Direction for our nation's energy policies.

The sooner we get started with alternative energy sources and recognize that fossil fuels makes us less secure as a nation, and more dangerous as a planet, the better off we'll be.

The future is green energy, sustainability, renewable energy.

If it's in people's interest to invest in renewables and invest in clean technologies, I'm convinced it will happen.

As long as the United States - and the world - gets its oil from the Middle East, we will be drawn into the endless crises that seem endemic to the region. American energy independence would not only liberate us, it would also drive down the worldwide price of oil.