Inappropriate Medicare imaging examinations may have produced as many tons of carbon dioxide equivalents as a town of 72,000 people annually.

Still, the directive could have a chilling effect on states and local governments that want to curb greenhouse gas emissions. Many governors and mayors did not retreat after the order was issued.

(AP) — Many of the world’s largest shipping nations decided on Friday to impose a minimum fee of $100 for every ton of greenhouse gases emitted by ships above certain thresholds, in what is ...

Many of the world’s largest shipping nations decided on Friday to impose a minimum fee of $100 for every ton of greenhouse gases emitted ... committed to just two years ago,” they said.

Finally, a compromise between the two models was reached. The United States didn’t participate in the negotiations in London, instead urging other governments to oppose the greenhouse gas ...