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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.

Interview with Bjorn Lomborg. 

John Allemang From Saturday's Globe and Mail Published on Friday, Nov. 27 2009

Under heat, climate-change contrarian won't wilt. The controversial Bjorn Lomborg doesn't deny global warming. But he believes it's ‘an incredibly bad deal' to spend so much money on cutting carbon emissions, he tells John Allemang.

Trying to showcase climate leadership at the U.N. Climate Summit in Glasgow, President Joe Biden is reaffirming his goal of creating “a carbon pollution-free power sector by 2035 and net-zero emissions economy by no later than 2050.” But that target will be prohibitively expensive. A new Nature study shows that a 95 percent reduction by 2050 — almost within reach of Biden’s net-zero — would cost 11.9 percent of GDP or more than $11,000 for each American every year.