Nations urged to improve climate pledges by April 2017

Climate Home: Date UN shuts book for signing Paris agreement is the moment for world to show it's cutting carbon faster, says Dutch thinktank

In a new global warming pact, countries set out milestones over the next five years in a bid to bridge the gap between national targets and what science recommends.

Climate offers from 187 out of 195 countries fail to cap warming to the upper limit of 2C this century. Instead the planet is set to heat up at least 2.7C, according to the UN.