Earth Day carries added significance this year with the official signing of the Paris Climate Agreement. More than 170 governments, including 40 heads of state, are attending the symbolic ceremony at the United Nations - the largest one-day signing of any international agreement, according to the UN. But will they live up to their commitments to reduce greenhouse gas emissions? Our environment editors take a look.
A programme prepared by Josh Vardey and Elise Duffau
EU policy advisor, Climate Action Change Network