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

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One Can See From Space How The

Stephen Hawking

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.

Topic

Ocean

Dark

Night

The Universe And The Laws Of Physics Seem To Have Been Specifically Designed For Us. If Any One Of About 40 Physical Qualities Had More Than Slightly Different Values, Life As We Know It Could Not Exist: Either Atoms Would Not Be Stable, Or They Wouldn't Combine Into Molecules, Or The Stars Wouldn't Form Heavier Elements, Or The Universe Would Collapse Before Life Could Develop, And So On...

Stars

Law

Quality