[mrsmith]

A drop of “minus 5% in 4 months” equals a 97% drop in revenue??

Doesn’t ring true.

[mrsmith]

Perhaps it is the 1990 metric that accounts for the great difference.
Only emissions greater than those in 1990 contribute to the revenue so a small overall reduction could have a large impact on the revenue.

not a very informative article IMHO, does contribute some but could have done better.

[Svartalfiar]

A drop of “minus 5% in 4 months” equals a 97% drop in revenue??
Doesn’t ring true.

Not just that. The math is off on this part too:
But along with this drop, Cap and Trade revenues from industrial purchases of pollution allowances dropped from $600-$850 million per quarter in 2019 to $25 million in May 2020 – a 97 % decrease.

They're taking a maximum amount from a previous quarter (THREE months!) and comparing it to a single month this year. Granted, it is still a big drop, but their numbers don't compare correctly.