The UN Environment Programme is using Google Maps to display an interesting atlas:
Many People: Atlas of Our Changing Environment:
This awesome global Google Maps mashup of UN data lets you explore before and after images to show how the environment is changing these locations. Each map marker will show you details about the location, images and a short story. There is also a link that will allow you to immediately open that location in Google Earth as well (More details on this from the Google Earth Blog). Planetizen Radar reports that this atlas was announced in June 2005 and since then has been available as a free download or book purchase.
More information: One Planet Many People