In a more acidic ocean, shellfish, plankton and corals struggle to adapt.
CO2 mixes with seawater to form carbonic acid, making the oceans more acidic.
What scientists know well, and what's left to learn, about extreme weather and climate change.
Greenhouse gases are trapping a lot of heat in the climate system and most of it is ending up in the ocean.
While any one month with above average temps might reinforce the reality that the world is warming, it’s the trend of that really stands out.
Since the advent of modern recordkeeping in 1880, the global average temperature has risen 1.6°F.
Atmospheric carbon dioxide levels continue to climb, averaging 400 parts per million for the month of February — the earliest in the year Earth has hit this global warming milestone on record.
This is the first time in at least 800,000 years, and possibly as long as 2 million, that atmospheric carbon dioxide levels have been this high.