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Carbon credit

A pesky steel mill byproduct finds a second life helping the planet

by Caleigh Wells
Jan 21, 2025
Steel slag captures carbon from the atmosphere. Companies with climate goals — and an Ohio motocross raceway — are making use of it.
This solid gravel at Delta Raceway originated as steel slag rocks, which remove planet-warming carbon dioxide from the atmosphere.
Caleigh Wells/Marketplace
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Ground rules for carbon markets

by Ellen Rolfes and Tony Wagner
Nov 15, 2024
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.
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Carbon offsets can be tough to get right

by Sabri Ben-Achour
Oct 21, 2021
If you can't pollute less, pay someone else to pollute less for you. Carbon offsets sound simple but are complicated in practice.
According to the Ecosystem Marketplace, the global carbon offset market is worth around $750 million. Above, a pilot carbon dioxide capture plant in Copenhagen, Denmark.
Ida Guldbaek Arentsen/Ritzau Scanpix/AFP via Getty Images
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