Both carbon dioxide and methane are greenhouse gases, and, therefore, promote global warming. Further, deforestation can lead to land degradation. Soil erosion increases which diminishes the land's ability to infiltrate rainfall and causes increased runoff and flooding. The land also becomes unstable and prone to landslides. One way is by satellite.
Satellites offer the ability to view large areas of land in a short period of time.
This is an effort to provide researchers the tools to further evaluate the changes in the Earth's forests and their effects on the rest of the planet. Global Warming and the Rainforest by Marco Bleeker. The Speed of Deforestation also by Marco Bleeker. Try the GCMD's Global Warming and Climate Change Policy links page .