A life-sustaining envelope of gas surrounds the earth. This atmosphere contains oxygen, CO2, water vapor, and other gases—it is what generates climate, which affects all living beings. This program analyzes the sun’s gradual brightening and the relationship between sunlight and CO2, explains why the atmospheres of Mars and Venus cannot sustain life, theorizes about the disappearance of dinosaurs and a dinosaur-friendly climate, and explains the relationship between climatic change and continental drift. (26 minutes)

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Part of the Series : Climate and Man

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		Sun, Sunlight, and Weather Patterns Climate is a changing phenomenon, the first signs of alteration appearing in its day-to-day behavior-i.e., the weather. One readily observable recent climatic change is the increase in the number and ferocity of giant weather events like hurricanes. ...(more details)		DVD $99.95 DVD + 3-Year Streaming $149.93 3-Year Streaming $99.95
		Global Warming The history of Earth has been a history of temperature change; people and animals have historically moved to better climes, richer pastures, and areas of more abundant food. The problem now is that "somewhere else" is already occupied; meanwhile, tem...(more details)		DVD $99.95 DVD + 3-Year Streaming $149.93 3-Year Streaming $99.95
		Civilization and Climate Changing climate probably played the decisive role in drawing hominids out of the trees, up on their hind legs, and off in search of food whose supply had been dispersed by the replacement of rainforests by grasslands. Migrations were motivated by th...(more details)		DVD $99.95 DVD + 3-Year Streaming $149.93 3-Year Streaming $99.95
		Danger Ahead: Is There No Way Out? If the threat of global warming has been created by our reckless use of technology, can we use technology to eliminate the threat? We could try to cool the earth by deliberately polluting the atmosphere, as volcanoes do, but suppose we overcooled the...(more details)		DVD $99.95 DVD + 3-Year Streaming $149.93 3-Year Streaming $99.95

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