Earthshots: Satellite Images of Environmental Change is a collection of Landsat images of certain locations from different years (usually from 1972 to 2000) that show the changes to agriculture, urbanization and other activities in Landsat’s false-colour imagery, from the Ogallala Aquifer to the Aral Sea. A little dated — the site was last updated in 2001 — and a bit hard to follow, since Landsat imagery isn’t always straightforward, but there’s lots of explanation on the site. Also via Plep.

See previous entries: One Planet, Many People; One Planet, Many People Redux.