Thread by @BjornLomborg

We apparently owe Al Gore an apology because more floods and more tornados

Except fewer tornados and not linked to climate
Except lower damage from flooding and not linked to climate

The insidiousness of climate alarmism: always something to worry about

npr.org/2019/06/08/730…

Since 1950, the number of US violent tornados (ER4-5) has more than halved

Since 1950, the number of US strong and violent tornados (ER3-5) has halved

And you can only show an increase if you include the very weak tornados

Increase in all tornados because increased measurement of weak tornados (bc doppler radar)
"can create a misleading appearance of an increasing trend in tornado frequency" — as Al Gore did in his film
web.archive.org/web/2012060906…

UN Climate Panel's report on extreme weather found that there is low confidence projections of tornados because we can't model them
ipcc.ch/report/managin…, p13

The UN Climate Panel can't see a trend in flooding — it doesn't even now if global flooding is going up or down (sign)
So, no, flooding is not showing global warming
ipcc.ch/report/ar5/wg1/, p112

The US Climate Assessment says that while there is both increases and decreases in flooding, it is not possible to attribute flooding to human-induced climate change
science2017.globalchange.gov/chapter/8/ page 231

Damages from US flooding, 1903-2018 have declined spectacularly, from around 0.5% of US GDP to less than 0.1% of GDP now

Maybe Al Gore and NPR owe us an apology for keeping scaring us silly?
npr.org/2019/06/08/730…

(Yes, climate is real, mostly human-made and a problem
But it is *not* a crisis/catastrophe
It will cost perhaps 2-4% of GDP by end of century, when our average income will be 300-500% of today's
Here from Nobel climate economist Nordhaus
nber.org/reporter/2017n…)