New York Times: Runaway growth in the emission of greenhouse gases is swamping all political efforts to deal with the problem, raising the risk of severe, pervasive and irreversible impacts over the coming decades, according to a draft of a major new United Nations report. Global warming is already cutting grain production by several percentage points, the report found, and that could grow much worse if emissions continue unchecked. Higher seas, devastating heat waves, torrential rain and other climate extremes...