Useful websites

http://www.stanford.edu/~moore/health.html
^ This website not only discusses the disadvantages, but it highlights the benefits of a warmer climate. It was produced at Stanford University, meaning it is a valid source, and relates to the topic that global warming does produce a positive impact.
http://news.nationalgeographic.com/news/2002/11/1122_021125_CropYields.html
^ This article from National Geographic points out that global warming may boost crop yields. The elevated amount of greenhouse gases will boost production of fruits and seeds in many popular crops.
http://www.greenhouse.gov.au/impacts/publications/alps.html
^ This article highlights the effects global warming will have on the biota in the Australian Alps. While there are obvious damaging effects, the benefits are also many.
http://www.soes.soton.ac.uk/teaching/courses/oa217/groupb.pdf
^ This document is an entire paper on the positive effects of global warming on estuaries. It states that there are damaging effects but that the positive effects were important to take into account.
http://www.mydigitallife.co.za/index.php?option=com_content&task=view&id=7975&Itemid=43
^ This website, while a little unorthodox, calls into account some positive things global warming can bring about.
http://www.ncpa.org/ea/eamj96/eamj96e.html
^ This website tells in detail about the benefits of global warming. It is a valid source (Stanford) and makes the case for a good global warming scenario.