Earth's Limited Resources
Different countries consume resources at different rates. If everyone started to match the rate of consumption of the average American, we'd need about four planets, right now.
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from NOVA PBS
Key Facts In This Video
The world's energy use is growing faster than its population. (0:17)
Coal, oil, and natural gas supply approximately 80% of the human race's energy. (0:44)
Increased CO2 in the atmosphere causes a slower release of heat from the planet, leading to increased temperatures. (1:33)