We have already reached 1.5C of warming, the initial IPCC target to avoid. The current GUARANTEED warming, even if we stopped emitting CO2 tomorrow, takes us past 2C of warming. That increase occurred in just a few decades. earthobservatory.nasa.gov/features/Ene...

Climate and Earth’s Energy Budget

Earth’s temperature depends on how much sunlight the land, oceans, and atmosphere absorb, and how much heat the planet radiates back to space. This fact sheet describes the net flow of energy through ...