manmade global warming?

Everyone is talking about global warming, they're all saying its all our fault, but is it?? If it is what can we do to help? You see car companies making battery powered cars to help lower carbon dioxide and other greenhouse gases, but if you look at the charts you can see that carbon dioxide makes up only about 0.054% of the greenhouse gases... so we don't REALLY need to worry about the C.O.2 in the air. It's no debate that the earth is getting hotter, but is it really our fault? If you look back in history you can see in the 14 century the Little Ice age took place and before that the Medieval Warm Period took place. This part of a earlier blog that i did last Sunday, and now I'm going to continue with part two! Global warming is being called a fact, but isn't a fact something we have proof of??? Al Gore said in his documentary that because the C.O.2 level is going up the heat is going up, but if you look at the same chart used in his documentary you see the exact opposite! the blue line is the C.O.2 and the white line is the temp, if you look closely you can see that it isn't until AFTER the temp spikes up does the C.O.2 go up.