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Is Human Activity an addition to increased Global Warming/Climate Change

Thank you for your reminder that I have not given a single evidence that goes against your case. To fight against a popular belief, the odds have been against me from the beginning. You have certainly won if this was a popularity contest. What I want to say in my previous argument was that you have not put matters into perspective. Here are my facts which I hope can put matters into perspective: A)Dinosaurs that roamed the Earth 250 million years ago knew a world with five times more carbon dioxide than is present on Earth today, researchers say, and new techniques for estimating the amount of carbon dioxide on prehistoric Earth may help scientists predict how Earth's climate may change in the future B) CO2 is not the only driver to climate change; atmospheric CO2 levels have reached spectacular values in the deep past, possibly topping over 5000 ppm in the late Ordovician around 440 million years ago. C) The global concentration of carbon dioxide in the atmosphere " the primary driver of recent climate change " has reached 400 parts per million (ppm) for the first time in recorded history, according to data from the Mauna Loa Observatory in Hawaii. D) Solar activity also falls as you go further back. In the early Phanerozoic, solar output was about 4% less than current levels. The combined effect of sun and CO2 matches well with climate. E) I hope you can agree that the Sun is an independent system of the Earth. Therefore, whatever we do on earth do not affect the sun's activities. My Analysis of the situation: [A] means that the earth is capable of sustaining life and handling CO2 level that is 5 times more than what we have today. [B] & [C] support the CO2 level is 10 times more than now prior to the dinosaurs, which roughly supports [A] [D] supports that it is the combined effect of sun and CO2 that contributes to the climate change. You can see that even if we increase our current output, it would take a long time to create CO2 level that is 5 times more than what we have now. Even at that level, earth can sustain life like dinosaurs. Therefore, human activity does contribute to climate change in the time scale of a 100 year, but to put in into perspective, over the time scale that date back to the beginning of life, human contributed CO2 level doesn"t affect life all that much. The sun would probably be a greater contributing factor than us human. Of course, with that said, even if we are not the major contributing factor, it is always our responsibilities to do less harm to others and to the nature" even though the sun would have killed us anyway in the end.