quote: Yet he brings up a valid point: where did the the CO2 come from?
quote: The largest continuous volcanic eruption on Earth – known as the “Siberian Traps” – had been pumping out CO2 for about a million years prior to the Permian-Triassic mass extinction
quote: The thing that has always bothered me about GW proponents is that one moment they are talking about climate changes in the past, and the next moment blaming human activities for current Climate Changes, without ever stopping and thinking about what they just said: the global Climate has changed numerous times in the past and would have changed in the future even if humanity had never existed.
quote: First of all, this is not an article about a study on modern GW, so why are you so threatened??
quote: Also, during this period in the Paleozoic, their were far less large land animals (like 6 billion humans) than there are today.
quote: Secondly, you appear to think that is not important to learn from historical events. This is a very foolish perspective, from a purely societal perspective and from a scientific perspective.
quote: We are also concentrating pollutants, such as mercury, sulfur, benzene, and ammonium into deposits and emissions many more times more concentrated than those found in nature. This is the dangerous thing about CO2 emissions and pollution in general--its the concentration, not the substances.
quote: Volcanic activity releases about 130 to 230 teragrams (145 million to 255 million short tons) of carbon dioxide each year.[7