(You could read the 36-page summary of the IPCC's new climate report. Or you could just read this, which is much shorter and tastier.)
It’s extremely likely that humans have been the dominant cause of global warming since the 1950s, according to a landmark report from the world’s top panel of climate scientists. And we’re failing in our efforts to keep atmospheric warming below 2 degrees Celsius, or 3.6 Fahrenheit, which many scientists say is needed to avoid massive disruption.
The IPCC also concludes that oceans have absorbed more of Earth’s excess heat since the 1990s than was the case during prior periods, explaining what climate deniers wrongly describe as a warming slowdown.
More than 90 percent of Earth’s extra heat is being absorbed by the oceans, where it’s affecting currents and causing water to expand, contributing to rising seas.
Oceans have absorbed about 30 percent of the CO2 that we have released into the atmosphere, and that’s what has caused the rise in acidity.