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Politics : Politics of Energy -- Ignore unavailable to you. Want to Upgrade?

To: Eric who wrote (7388)	4/22/2009 5:42:08 PM
From: The Vet	1 Recommendation Respond to of 86356

Neither is true, so what is the process that causes the earth to cool again and CO2 levels to drop? It has never been explained, but I am sure it wasn't a carbon trading scheme organised by past civilizations! Asteroid impacts, major volcanic activity ??? But those effects are solar effects. ie. they cause temperatures to fall by reflecting part of the heat from the sun back into space before it even gets to the earth surface. They certainly happen, but they don't help your case at all. That would cause a temporary drop in temperature for a short period, but I fail to see how it would affect the CO2 already in the atmosphere. Reduced solar radiation actually reduces the ability of plants and plankton to utilize CO2 and lock it up out of the atmosphere, so what other process do you propose which actually drops the CO2 levels back down to levels that won't have the significant warming effect you postulate elevated CO2 causes? You have explained brief periods of drops in temperature with these one off events, but that explanation can't get rid of the CO2 that you say should have caused a prior thermal runaway, so as soon as the short temporary effect of the asteroid or volcanic activity subsided then the temperatures should simply run up again due to persisting high atmospheric CO2 under that explanation. So I ask again, how is it that the recorded high atmospheric CO2 levels (and higher temperatures) which all scientists agree have occurred in the past, were ever reduced? If CO2 is a serious greenhouse gas theory is correct why don't CO2 levels and temperatures rise together throughout history?

To: Eric who wrote (7388)	4/22/2009 7:31:27 PM
From: RetiredNow	Read Replies (2) \| Respond to of 86356

In Obama's own words: The president said there is no "silver bullet" to solving the country's energy needs, and that a variety of energy sources will be required to reduce dependence on fossil fuels. The United States needs to boost domestic production of oil and natural gas in the short term before fully transitioning to alternative sources, Obama said. But over the long term, new energy sources will be required both to address the issue of climate change and strengthen the economy, he said. cnn.com