How did a sudden reduction in shipping pollution inadvertently stoke global warming?

A major shift in global shipping regulations intended to improve air quality may have temporarily — and inadvertently — set off a geoengineering reaction that is warming the planet, new research has found.

In January 2020, the International Maritime Organization substantially reduced the amount of harmful sulfur dioxide content allowed in shipping fuel. The move was part of a broad strategy to improve public health.

Read more at the Los Angeles Times.