Steel slag captures carbon from the atmosphere. Companies with climate goals — and an Ohio motocross raceway — are making use of it.

In this week’s “Make Me Smart” newsletter, we explain the latest moves to establish a credible global market for carbon credits. Plus, we do the numbers on open enrollment and the rising cost of health care.

Emissions worldwide hit a record high last year. But at the same time, more renewables have been coming on line.

The Biden administration wants increase the use of sustainable aviation fuel around 180 fold by 2030.

The rules are softer than those initially proposed.

Right now, sustainable aviation fuel is “a drop in the bucket” compared to conventional jet fuel, but that might not be the case for long.

For every electric F-150 it sells, it can sell up to 12 gas-powered models and comply with emissions rules. Those rules may be updated.

The promise of hydrogen fuel is that it could cut emissions in industries that have proven difficult to decarbonize. It’s a lot of pressure for an industry that’s barely off the ground.

Companies including Ikea, Nestle, Unilever and Volvo are saying that they’re already grappling with the costs of the climate crisis.

Microsoft is paying $200 million to a company using crushed rock to absorb carbon, and the Frontier consortium is backing emerging technology.