Global warming will have winner's and losers.[1] However, there's expected to be "billions" of people negatively affected by global warming.[2]
For credible information of global warming, check out the following websites:
For beginners:
http://epa.gov/climatechange/kids/
http://earthobservatory.nasa.gov/Features/GlobalWarming/global_warming_update2.php
http://www.metoffice.gov.uk/climatechange/guide/
For more details:
http://ipcc-wg1.ucar.edu/wg1/Report/AR4WG1_Print_FAQs.pdf
http://www.ipcc.ch/
http://www.giss.nasa.gov/
http://www.skepticalscience.com/
http://www.nature.com/climate/index.html