What Does That Mean?

Last year was the hottest year on record, and actually the first time that we hit one degree global average above the pre industrial level. 15 of the 16 hottest years in the last hundred and 50 years have been since the year two thousand,. So that's how we know that it's really warming. But it's a, it's a complicated story, because part of the reason it's so hot is because there's this elnino phenomenon happening.