Bjorn Lomborg Profile picture
Author of 'Best Things First', 'False Alarm', and 'Skeptical Environmentalist', President Copenhagen Consensus: smart solutions through economic prioritization

Oct 13, 2021, 6 tweets

Electric cars net-bad everywhere

Switching from gasoline to electric means less CO₂

but electric cars 500kg+ heavier and therefore deadlier in accidents

Using realistic carbon cost at $68/ton (EU)

more deadly outweigh less CO₂

New Nature study:
nature.com/articles/d4158…

Electric cars are in general much heavier than their gasoline counterparts, which makes them much more dangerous in traffic

nature.com/articles/d4158…

Not surprisingly, this is not the preferred message,

so Nature article uses unrealistic $150 CO₂ price

Switching to heavier electric car on very clean electricity grids like Norway/France juust ok

Even at $150, switching bad in US, Germany, Japan, China, India & Australia

Electric cars net-bad everywhere

Switching from gasoline to electric means less CO₂

but electric cars 1000lb+ heavier and therefore deadlier in accidents

W/realistic cost of $9.3/ton CO₂ (US RGGI)

more deadly way override less CO₂

New Nature study:
nature.com/articles/d4158…

Study emphasizes cost-benefit is a simplification:

Leaves out
injury (electric cars worse)
air pollution (electric cars better, though pubs.acs.org/doi/abs/10.102…)
air pollution (heavier electric cars means more air pollution from tires)

To the many arguing that heavier (electric) cars are safer: yes, for their occupants, but even more unsafe for the cars they hit, leading to overall higher risk of mortality

A heavier car has externality, making others die more

Based on this:
academic.oup.com/restud/article…

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