Roger Harrabin - BBC environment analyst
The government has been blamed for failing to reduce demand for flying and meat-eating as part of its plans to rein in climate change.
The Climate Change Committee advisory body says ministers also have not shown how to achieve their ambition of cutting the demand for road travel.
It warns a “techno-centric” approach to cutting emissions adopted by the prime minister has a high risk of failure.
But a report from the committee praised the government's Net Zero Strategy.