Recent extreme weather events have prompted the debate about effects of human activity on the world's climate. Now you can help us to determine the extent to which extreme weather events like the United Kingdom floods of Autumn 2000 are attributable to human-induced climate change. We invite you to download and run high-resolution model simulations of the world's climate on your own computer. By comparing the results of these simulations, half of which will include the effects of human-induced climate change, and half of which will not, we will investigate the possible impact of human activity on extreme weather risk. Thank you for your help, and please join the project