Climate Central: In a study that could have important ramifications on estimating the impacts, costs and benefits of reducing carbon dioxide emissions, new research shows that CO2 brings peak heat within a decade of being emitted, with the effects then lingering 100 years or more into the future. The research, published Wednesday in Environmental Research Letters, provides policymakers and economists with a new perspective on how fast human carbon emissions heat the planet. Back-of-the-envelope estimates for how...