Emissions of heat-trapping carbon dioxide from the burning of fossil fuels decreased slightly this year due to the Iran war. It’s only the third decrease in carbon pollution this century. Experts believe this is not the long-sought bending the curve of emissions. Instead, they think it is temporary like the previous drops during the COVID-19 pandemic and the 2008 recession. The world is still putting more than 1,300 tons of carbon dioxide into the air every second. Pollution went down about 1% in the U.S., China and Europe.