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Bill Gates’s private jet at Kristiansand airport in Kjevik, Norway

Scanpix Norway/PA Images

Bill Gates has admitted to flying on a private jet to the Paris climate change summit in 2015. Green campaigners say the revelation, made in his new book on reducing carbon emissions, undermines the billionaire philanthropist’s message.

The Microsoft co-founder’s book, How to Avoid a Climate Disaster, lays out how and why he thinks the world can get from emitting 51 billion tonnes of greenhouse gases a year today to net zero by 2050.

Gates concedes that he is an “imperfect messenger on climate change”, …