UNFCCC Global Map
The United Nations Climate Change Secretariat (UNFCCC) has worked with a number of Google employees to create a Google Map that visualises the greenhouse gas emissions of a number of countries.
The map gives users the ability to visualise data collected since 1990. It is possible to select any combination of emission categories to view on the map and to choose to view any year's data from 1990.
Via: Google LatLong: Visualizing greenhouse gas emissions