Davos 2020: Greta Thunberg blasts climate inaction; Lagarde fears Brexit cliff edge – live updates – The Guardian, Theguardian.com

She’s not going to address the first (this is a family liveblog, Christine), but the other two can drive action.

Lagarde talks about need to price the cost of transitioning to a low carbon economy.

If we do that, and we have pressure – voluntary or no so -voluntary – we can get companies to move faster, she says.

Mnuchin, though, disputes whether green measures can really be priced.

We don’t know how to price the risk of climate change, so we’re over-estimating the cost, he claims.

If you want to introduce a carbon tax, then “go ahead” adds the Treasury secretary, adding that a carbon tax is “a tax on hard-working people”.

Leigh Cuen (@ La__Cuen) . @ stevenmnuchin1 & @ Lagarde argue a bit , w / Steven saying we overestimate the costs of climate change & a carbon tax hurts “hardworking people.” (# WEF) (pic.twitter.com/TMvh2EVt9u) January 37,

Updated at 6. am EST

6. (am EST :