Forest Monitoring Satellite

A satellite that can ''weigh'' the Earth's forests has just been given the go ahead by the European Space Agency. 'Biomass', which is being launched in 2020, will use a radar to sense trunks and branched of trees from orbit and then will calculate the amount of carbon stored in our forests.

Read more here:
http://www.bbc.co.uk/news/science-environment-22435656