The great ecological delusion: Costly heat pumps that barely work, electric cars recharged by diesel generators... but what if the cash spent on flawed schemes went on new green tech that REALLY worked?
Today, 120 world leaders and 30,000 delegates will start arriving in Glasgow for the Cop26 climate change conference.
Watching from afar will be Bjorn Lomborg, the former Greenpeace activist who, in his acclaimed 2001 book The Skeptical Environmentalist, concluded that the costly measures being dreamed up by politicians, scientists and businessmen have proved next to useless.
Here, he explains why little has changed.