Increasing greenhouse gases are the overwhelming reason why 2015 will be the hottest year on record.
Global average temperatures are generally higher in El Niño years vs. La Niña years.
Daily record highs are outpacing record lows across the U.S. due to climate change.
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.