The total number of tons we emit is directly connected to average, global temperature rises. The UN estimates that an extra 1,000 Gt of carbon dioxide emitted will result in a 0.8°F increase over the long run. That means that an extra 6,000 Gt over the century will result in a temperature rise of about 5.7°F or so. Since we’re already almost 2°F above preindustrial levels, that means that the twenty-first century will see the planet get roughly 7.5°F hotter if we do nothing,
