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Global warming has been taking place since the ice age. |
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The dust bowl was caused by farmers removing the prairie grass. |
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The number and magnitude of floods and hurricanes has been steadily increasing in recent years. |
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Tornado activity is becoming more common in more northernly places, moving "tornado alley" northward from Oklahoma towards the upper midwest. |
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The ocean level has been slowly but steadily rising in most places. |
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The CO2 increase in the atmosphere is due to both natural events and things that man does.
- Volcano eruptions
- Forest fires
- Burning coal and other fossil fuels
- Automobile emissions
- Number and size of domestic herds
- General population
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Changes in the ozone layer are independent of anything man does. |
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Toxis waste is all natural. |
