The issue of climate change is one that we ignore at our own peril. There may still be disputes about exactly how much we're contributing to the warming of the earth's atmosphere and how much is naturally occurring, but what we can be scientifically certain of is that our continued use of fossil fuels is pushing us to a point of no return. And unless we free ourselves from a dependence on these fossil fuels and chart a new course on energy in this country, we are condemning future generations to global catastrophe.
To reduce the risk of a global environmental catastrophe, and to avoid reversing the course of human progress, the world must urgently bend the curve of global emissions away from fossil fuels.
We must rapidly wean ourselves off our dependence on coal and fossil fuels.
Our dependence on fossil fuels amounts to global pyromania, and the only fire extinguisher we have at our disposal is renewable energy.
It will be nearly impossible to slow warming appreciably without condemning much of the world to poverty unless energy sources that emit little or no carbon dioxide become competitive with conventional fossil fuels.
Yet, despite our many advances, our environment is still threatened by a range of problems, including global climate change, energy dependence on unsustainable fossil fuels, and loss of biodiversity.
This year - today - I am repenting of my dependence on fossil fuels.
One of my top priorities in Congress is to reduce U.S. dependence on fossil fuels.
Society's dependence on fossil fuels is jeopardising social and economic progress.
We need an energy revolution by breaking our dependence on fossil fuels, polluting fuels... I am very, very confident our small state will lead this. We will be noticed by the country and the world.
We're going to get off fossil fuels, no question. We may not do it quickly enough to avoid some pain, and I'm quite worried about that. But by the 22nd century, there's no way we'll be on fossil fuels.
I oppose the construction of the Keystone XL Pipeline. It's an ill-conceived project that would lock us into further dependence on some of the dirtiest fossil fuels on the planet.
All scientists who've looked at it know we have to phase away from burning fossil fuels. That means we've got to put a lot of effort into alternate energy technologies, but we're still subsidizing fossil fuels and not subsidizing most of the alternatives. It's not going to be an easy transition.
About half of all potential future global warming emissions from United States fossil fuels lie in oil, gas and coal buried beneath our public lands, controlled by the federal government and owned by the American people - and not yet leased to private industry for fuel extraction.
The U.K. government faces three choices to deal with carbon-heavy fossil fuels: force people to stop using them immediately; facilitate a rapid transition from fossil fuels to renewable energy; or hope business-as-usual market forces solve our problem for us.
The probability that we face global warming caused by fossil fuels is now so overwhelming that it is legitimate to doubt the motives of those who deny it