Using satellite data on how water moves around Earth, NASA scientists have solved two mysteries about wobbles in the planet's rotation - one new and one more than a century old. The research may help improve our knowledge of past and future climate.
This year, Earth Day coincides with the signing ceremony for the Paris Agreement on Climate Change, which takes place at UN Headquarters in New York. The Agreement was adopted by all 196 Parties to the United Nations Framework Convention on Climate Change at COP21 in Paris on 12 December 2015.
By Ban Ki-Moon (*) - For the nearly nine years that I have been Secretary-General, I have travelled the world to the front-lines of climate change, and I have spoken repeatedly with world leaders, business people and citizens about the need for an urgent global response
Several major environmental groups, including Greenpeace and WWF, have walked out of UN climate talks in Warsaw, Poland in protest at what they see as a lack of progress towards an international deal to curb rising global greenhouse gas emissions.