At an informal meeting on September 2-3 among 46 nations in Geneva, Environment ministers and senior officials examined how to raise a promised $100 billion a year for the Green Climate Fund  from 2020. Revenues from carbon markets, higher plane fares or taxes on shipping – could be managed by the Fund.  Mexico’s Foreign Minister Patricia Espinosa said a Green Fund would only be agreed as part of a broad package in Cancún, including ways to share clean-energy technologies or protect carbon-absorbing forests. She said all elements of the package had to be agreed, or none. US climate envoy Todd Stern told a news conference that the meeting had been “pretty constructive”. Mexico will host an annual UN climate meeting in Cancún from 29 November to 10 December. A Green Fund is meant to help poor nations shift from fossil fuels and cope with projected floods, droughts, mudslides and rising seas caused by climate change. It will include funds for technology cooperation between developed nations and emerging economies. The EHA has been approached by South Africa and a West Africa Hydrogen Network to look for potential hydrogen cooperation.