| | #16 | |
| glancing up through the rain | Quote:
We may foul up the earth a bit for a few centuries. But the planet has been around for five billion years, it'll recover from whatever we throw at it relatively quickly. There is very little we could do to really permanently affect the Earth. | |
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| | #17 |
| Administrator Join Date: May 2004 Age: 18
Posts: 3,082
Rep Power: 14 ![]() ![]() ![]() ![]() ![]() ![]() | brb, gonna spray some aerosol into the atmosphere while I leave my car's engine running |
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| | #18 | |
| *~Stickerbrush Join Date: Sep 2007 Location: In a cereal box
Posts: 1,814
Rep Power: 3 ![]() | Quote:
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| | #19 | ||
| Think smaller, more legs. Join Date: Dec 2005 Location: Blowing up The storm's around. In a silence Have a better dream. There is an end but it's endless. Age: 15
Posts: 6,869
Rep Power: 10 ![]() ![]() | Quote:
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*Points at people* Wimpy wimpy wimpy. | ||
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| | #20 |
| glancing up through the rain | |
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| | #21 |
| Golden Knight pssshh, Im Charlie K! | Ut's true that thw world goes through the warming and cooling process, but we are Speeding up the warming process..Which if you didnt know is WAY BAD... |
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| | #22 |
| Your Mom's Mom's Daughter Join Date: Feb 2007 Location: Orlando Florida Age: 16
Posts: 1,319
Rep Power: 4 ![]() ![]() | What proof do you have that will support that statement? OTHER than the Earth's natural cycles, because Humans weren't a variable at that time. |
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| | #23 |
| swathed in ever-light | Granted, there is a faux populism around global warming; however, to be a contrarian is something else undesired. |
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| | #24 |
| Think smaller, more legs. Join Date: Dec 2005 Location: Blowing up The storm's around. In a silence Have a better dream. There is an end but it's endless. Age: 15
Posts: 6,869
Rep Power: 10 ![]() ![]() | |
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| | #25 | |
| glancing up through the rain | Quote:
65 MY ago — at the Cretaceous-Paleogene transition (the K/T or Cretaceous–Tertiary extinction event) about 50% of all species became extinct. It has great significance for humans because it ended the reign of dinosaurs and opened the way for mammals to become the dominant land vertebrates. In the seas it reduced the percentage of sessile animals to about 33%. The K/T extinction was rather uneven — some groups of organisms became extinct, some suffered heavy losses and some appear to have been only minimally affected. 200 MY ago — at the Triassic-Jurassic transition (the Triassic-Jurassic extinction event) about 20% of all marine families as well as most non-dinosaurian archosaurs, most therapsids, and the last of the large amphibians were eliminated. 251 MY ago — at the Permian-Triassic transition, Earth's largest extinction (the P/Tr or Permian-Triassic extinction event) killed 53% of marine families, 84% of marine genera, about 96% of all marine species and an estimated 70% of land species (including plants, insects, and vertebrate animals). The "Great Dying" had enormous evolutionary significance: on land it ended the dominance of mammal-like reptiles and created the opportunity for archosaurs and then dinosaurs to become the dominant land vertebrates; in the seas the percentage of animals that were sessile dropped from 67% to 50%. The whole late Permian was a difficult time for at least marine life — even before the "Great Dying", there was level of extinction large enough to be included in the "Big Five". 360 MY ago — near the Devonian-Carboniferous transition (the Late Devonian extinction) a prolonged series of extinctions eliminated about 70% of all species. This was not a sudden event — it lasted perhaps as long as 20 MY, and there is evidence for a series of extinction pulses within this period. 444 MY ago — at the Ordovician-Silurian transition two Ordovician-Silurian extinction events occurred, and together are ranked by many scientists as the second largest of the five major extinctions in Earth's history in terms of percentage of genera that went extinct. 488 million years (MY) ago — a series of mass extinctions at the Cambrian-Ordovician transition (the Cambrian-Ordovician extinction events) eliminated many brachiopods and conodonts and severely reduced the number of trilobite species. We seem to have recovered quite nicely. | |
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| | #26 |
| Ruler of Light Join Date: Mar 2008 Location: Well... Go find me Age: 17
Posts: 521
Rep Power: 1 ![]() | Hasn't it occured to you that it's better to do something about the problem instaid of waiting and see if it will turn out better then expected. If you do nothing it will very likely have severe consequenses. |
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| | #27 |
| swathed in ever-light | I'd rather take a few more conservation steps in my daily routine then run a plausible risk of having disastrous world climate change effects. And to be honest, a little more conservation ethic for our nation might do us some good anyway. |
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| | #28 |
| glancing up through the rain | I have nothing against saving the environment, despite the image I probably give off. |
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| | #29 | ||
| Your Mom's Mom's Daughter Join Date: Feb 2007 Location: Orlando Florida Age: 16
Posts: 1,319
Rep Power: 4 ![]() ![]() | Quote:
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Sorry if I missed somthing but, it never says what caused these extinctions. | ||
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| | #30 | |
| glancing up through the rain | The point that he was trying to get across was proved nonetheless. Quote:
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