Your second point was that temperatures were higher in...
CO2 emissions are directly responsible for climate change.
Thank you for the chance to debate this topic. I am an avid believer that climate change is mainly man made, at least now. Your first point was how even though data shows a correlation between CO2 emissions and temperature, carbon emission is not the largest factor. But according to the World Meteorological Organization (as well as NASA and countless organizations and scientists), CO2 is the largest factor of global warming. This study included natural substances like water vapor. The problem with CO2 is that it is a very abundant greenhouse gas which takes a long time to dissipate from the atmosphere. 65% of global emissions are CO2 emissions, making it by far the most abundant man made greenhouse gas. Even though it isn't as abundant as water vapor, it is much more effective at trapping the Sun's rays. Now, greenhouse gases are the largest cause of global warming, while the most effective and very abundant greenhouse gas is CO2. Here are some graphs: From NASA, this is probably the most infamous graph as it shows just how drastic CO2 emissions have gone up. (It won't let me post photos, so here is the link) http://climate.nasa.gov... Enlightening, isn't it? Now this concerns temperature rise at the same time as CO2 rise. http://climate.nasa.gov... This link should have the graph close to the top on the right hand side Not only that, but a massive 97% of all scientists agree global warming is man made. ------- Your second point was that temperatures were higher in the past than they are now (specifically, during the time of Roman civilization). While there definitely are natural cycles that rise and lower, Earth's temperature is accelerating at a much faster rate than any natural cycle before, and shows no sign of stopping like a cycle would. This is again, because of man made emissions, and the majority of those are carbon. ------- Your third point was that global warming is mainly due to sun rays hitting the earth and heating it up. While sun rays hit the earth and that is what causes all weather, the amount of rays stays basically stable like the earths orbit. So when greenhouse gases are released into the atmosphere, they trap sun rays and warm the earth. So the evidence shows clearly that global warming is mainly people driven, although natural cycles may contribute to the increase. The evidence shows clearly that greenhouse gases are the largest cause of global warming. The evidence shows clearly that CO2 is the largest greenhouse gas threat. Therefore, the evidence shows that CO2 is the main cause of global warming. Sources: https://www3.epa.gov... http://climate.nasa.gov... https://www3.epa.gov... https://www.wmo.int...