If the first three months of 2016 are any indication, meeting the 1.5°C challenge will be increasingly difficult.
A new report constructs a sea level timeline going way back. Hard to miss the human influence in the 20th century.
New analysis looks at the human-caused influence on the number of coastal flood days across the U.S.
Record warm November continues the trend of a record hot 2015.
2015 marked the first time since recordkeeping began that the global average temperature climbed to more than 1°C (1.8°F) above pre-industrial levels.
Atmospheric CO2 has reached a concentration unseen for more than 400,000 years, up 33 percent in the last century.
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.