As world leaders prepare for climate talks in Paris at the end of November, Nasa satellites have been flying around earth tracking rising carbon dioxide levels, which scientists say are driving climate change. They include the new experimental Orbiting Carbon Observatory-2 (OCO-2), which was launched in 2014 and designed to give scientists a fuller picture of the effects.
Nov 21, 2015
Science & Health
Kjell Lindgren played Amazing Grace as a tribute to a colleague who died in October.
Nov 13, 2015