"In her last significant act as Prime Minister, Theresa May changed the UK's Climate Change Act to commit us to eliminating all greenhouse gas emissions in the UK by 2050. This decision is based on good climate-science, was a response to a great wave of social protest and has been replicated in 60 other countries already," the Absolute Zero report commissioned by the UK government explains.

According to the authors of the study, the only way that the UK government can meet their Absolute Zero obligations is to phase out all air travel, implementing an outright ban in 2050 until such a time as the government can conceive of a means of producing planes that produce zero greenhouse gases at any point during an aircraft's production or use.