Thread by @BjornLomborg

Why is the World Economic Forum taking climate advice from a 16 year old climate campaigner instead of the world’s only Nobel climate economist?

"Let's stop emissions" is simple but also absolutely impossible
CO₂ emissions are byproducts of billions of people using reliable and cheap energy for heat, cold, food, electricity – all the things that make the world a better place

Nordhaus shows that a moderate, increasing, globally coordinated carbon tax can reduce temperatures – optimally by 0.6°C in 2100 down to 3.5°C
Policy costs of $20 trillion will still be outweighed by lower climate costs
doi.org/10.1257/pol.20…

But remember, this is already incredibly challenging (it requires *all* nations to tax all carbon, all at the same pace across the century
If not, the policy costs will escalate, making climate policy less effective and possibly net damaging

And Thunberg's solution to "just say no" is not only naive and impossible. Trying to attain it, will incur tens or even hundreds of trillions of dollars of net costs.

World Economic Forum is committed to improving the state of the world – and this ain't it