The Water Planet: Origin of Life on Earth
There is no definitive evidence that proves beyond a doubt where water originated. But wherever it came from, water did eventually cover more than two-thirds of Earth's surface. The implications of this for the formation of life on planet Earth were...
Subject: hydrogen
Transcript: life? Two reasons. One, life is made out of chon-- Carbon, hydrogen, oxygen, nitrogen. Water is made out of two Of those elements-- hydrogen and oxygen
The Water Planet: Early Earth
At one time, Earth was a very different planet than it is today. Its atmosphere, in particular, bore very little resemblance to the one that we depend on for the air we breathe. It probably consisted primarily of carbon dioxide and nitrogen gas.
Subject: hydrogen
Transcript: something of enormous importance-- namely, water. Water is made of h2o, and the hydrogen was formed probably Very close to the origin of the universe at some
Alternative Sources of Energy
Paul Ehrlich, best known for his work on population growth, discusses solar hydrogen technology as an alternative to fossil fuels and nuclear energy.
Subject: hydrogen
Transcript: world? The answer is, of course, neither. What we, the united states and australia And other countries, should be doing is developing Solar hydrogen
Air: Fuel Cell Technology: The Clean Air Solution?
In the area of zero emissions technology, fuel cells are very promising. When using hydrogen in a fuel cell, the only byproduct is water vapor. The
Subject: hydrogen
Transcript: hydrogen in a fuel cell, the only byproduct is water vapor. They're a very old technology, First used in the space program in the '60s. The gemini space
Environmental Solutions in the Future
voltaic cells which don't yield any carbon dioxide, and hydrogen is combined with oxygen in fuel cells that power our cars, power plants and factories.
Subject: hydrogen
Transcript: don't yield any carbon dioxide. That it'll be the electricity from the photo voltaic cells Will be used to hydrolyze water and that hydrogen will be