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Strategies & Market Trends : 2026 TeoTwawKi ... 2032 Darkest Interregnum -- Ignore unavailable to you. Want to Upgrade?

To: Slagle who wrote (16034)	3/27/2007 4:34:44 PM
From: Snowshoe	Read Replies (2) \| Respond to of 218428

Slagle, There is a difference between descriptive and pejorative usage of the terminology. To be most precise, terms like "wayo" and "scam" refer to deliberate trickery. But the usage is often expanded by the user for whatever political axe he wishes to grind. Your geology discussion was interesting and I could provide similar examples from my own location. But you are reasoning that climate fluctuated in the past without human influence, therefore humans do not influence climate. That is faulty logic. -Snow

To: Slagle who wrote (16034)	3/27/2007 7:48:38 PM
From: Moominoid	Read Replies (1) \| Respond to of 218428

The main reasons it was warmer at those times was there was more carbon dioxide and/or methane in the atmosphere and/or the sun appeared brighter. Same story now. Carbon dioxide and methane in the atmosphere has always fluctuated for natural reasons and we don't yet understand at all fully why - one cause has been changes int he rate of volcanic activity, sedimentation, feedbacks from changes in the solar irradiance on plant growth etc. The build up of both gases since the Industrial Revolution however is primarily due to humans burning fossil fuels, and increasing sources of methane (cattle, rice paddies, leaks of natural gas etc.). Evidence that the added carbon source is from fossil fuels is based on among other things the isotope mix that shows that the carbon is coming from ancient buried carbon (and changes in vulcanism can't explain the huge increase). There's no real doubt that humans are primarily causing the CURRENT buildup in greenhouse gases and that they have a warming effect. There is still a high degree of uncertainty on the amount of warming this will cause and the type of impacts that will happen as a result.