Stephen Hawking Quotes About Global Warming

Quotes about: Global Warming

• One can see from space how the human race has changed the Earth. Nearly all of the available land has been cleared of forest and is now used for agriculture or urban development. The polar icecaps are shrinking and the desert areas are increasing. At night, the Earth is no longer dark, but large areas are lit up. All of this is evidence that human exploitation of the planet is reaching a critical limit. But human demands and expectations are ever-increasing. We cannot continue to pollute the atmosphere, poison the ocean and exhaust the land. There isn't any more available.

  Stephen Hawking

  Ocean, Dark, Night

  "The 11th Hour". Documentary, www.imdb.com. 2007.

• I don't think the human race will survive the next thousand years, unless we spread into space. There are too many accidents that can befall life on a single planet. But I'm an optimist. We will reach out to the stars.

  Stephen Hawking

  Stars, Optimistic, Thinking

  "Colonies in space may be only hope, says Hawking". Interview with Roger Highfield, www.telegraph.co.uk. October 16, 2001.

• I would like nuclear fusion to become a practical power source. It would provide an inexhaustible supply of energy, without pollution or global warming.

  Stephen Hawking

  Fusion, Energy, Nuclear

  Q&A, content.time.com. November 15, 2010.

• If it were only a few degrees, that would be serious, but we could adapt to it. But the danger is the warming process might be unstable and run away. We could end up like Venus, covered in clouds and with the surface temperature of 400 degrees. It could be too late if we wait until the bad effects of warming become obvious. We need action now to reduce emission of carbon dioxide.

  Stephen Hawking

  Running, Clouds, Waiting

• There is no way that we can predict the weather six months ahead beyond giving the seasonal average.

  Stephen Hawking

  Average, Weather, Giving

  "Predicting the Future". Book by Leo Howe and Alan Wain, 1993.

• Life on Earth is at the ever-increasing risk of being wiped out by a disaster, such as sudden global warming, nuclear war, a genetically engineered virus or other dangers. I think the human race has no future if it doesn't go into space. I therefore want to encourage public interest in space.

  Stephen Hawking

  War, Thinking, Race

  "Stephen Hawking Urges Human Colonization of Other Planets". www.foxnews.com. June 13, 2006.

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