>GW Ranch received a permit from the state of Texas allowing the gas power plant to emit 33 million tons of carbon dioxide into the atmosphere. If the project emitted that much CO2, it would be the largest single source of pollution in the United States
Immediately following that is the text
"It’s worth noting that companies rarely emit as much as their permits allow"
It's also worth noting that the headline turns "largest single source" of CO2 to "top source" of climate pollution. They say pollution in the text, but context would suggest they are talking about CO2. To say otherwise would be a much stronger claim which I don't think you can assume unless they clearly assert it.
I'm not sure if it is possible to quantify scale of climate impact between different types of pollution, but it seems like a stretch to unilaterally declare that the single top producer of CO2 is the top environmental impact. It may be, but they are making claims beyond what were made in their sources.
I was under the impression that there were a few chemicals that had an outsize effect on climate pollution.