Several gases, including carbon dioxide, methane, and nitrous oxide, warm the planet as their concentrations in the atmosphere increase. As the world economy grows, so do emissions of these gases, accelerating the pace of human-caused climate change.
人为气候变化的原理对全球公众而言已经不再陌生。大气中二氧化碳、甲烷和一氧化二氮等几种气体的浓度上升导致地球升温。温室气体排放随世界经济发展而增长，由此导致人为气候变化的步伐加速向前迈进。