麦肯锡：2024年什么是净零？（英文版）

A net-zero gain of greenhouse gases (GHG) in the atmosphere would be achieved when the level of GHG emissions released into the atmosphere is equal to the level of emissions that are removed. This is also referred to as “carbon neutrality.” One of the most common GHGs, CO₂, is found in the Earth’s atmosphere and, along with nitrogen, oxygen, methane, and other gases, is part of the planet’s air. CO₂ helps trap heat on Earth, like a greenhouse traps heat to grow tomatoes in cold climates. But