RE:RE:RE:Another temperature record set in Kansas CityI have a science background Topsy. You are right in stating that the Earth has undergone changes in temperature over the course of its history. The question is whether "HUMANS" have affected this change and the answer is yes we have. The more important question is by "how much". I don't think that every climate event is caused by humans. Case in point, In the 17th century Europe experienced 3 years of no summer. Crops failed and many resortedto cannibalism toin order survive. That's where we get the "Hansel and Gretel" fairy tales and many more that the Brothers Grimm collected and published.