Citigroup analysts predict the cost of carbon offsetting commercial flights could exceed $6bn a year by 2025
Government disappoints campaigners by insisting shipping and aviation emissions should be dealt with at a UN level
UK trade group Airlines UK warns net zero by 2050 will not be achieved without more government support for green aviation technology development
Net zero goal makes case against Heathrow expansion far stronger, campaigners claim
CCC report on behaviour change needed to hit net zero goal also calls for a frequent flier levy and scrapping of air miles schemes
Technology is initially planned for a site in the US, but could also be used in the UK if a proposed plant is given the go-ahead, Velocys says
Hydrogen fuel cell powertrain technology has the potential to cut emissions for transport to remote islands, say technology developers
An eight-country poll reveals deep concern about the climate crisis, with large proportions of the population ranking it as the top global issue that needs tackling
New analysis from International Council on Clean Transportation finds commercial aviation emissions have shot up by a third since 2013
YouGov survey of 2,000 people finds more than 60 per cent believe tackling climate crisis requires high or extremely high urgency