Researchers at Cambridge University, University College London and Imperial College London, as well as international partners from Switzerland, Germany, the US and Austria found that

> For every tonne of carbon dioxide emitted, the global economy would be $3,000 worse off by the end of the century, they estimated.

This is because they observed that the time it takes for communities to recover from natural disasters takes more than a few months.

I would like to see the study(ies) the researchers put out so that I can see what kind of assumptions they made. I did not see their work referenced in the article.