Check out the Ecological Footprint Calculator. Mine is "estimated to be 4.5 hectares (11.1 acres)." Apparently "if everyone in the World lived lived like I do, we would need 2.4 Planets to support global consumption". Oops. Before we all destroy our blue planet, you might want to check out the Timeline of Art History, which is also quite interesting. Click here for details for the Low Countries.