The American Association for the Advancement of Scientists (AAAS) published a new report, What we Know, urging Americans to take actions on climate change. The report presents three key messages:
- climate scientists agree: climate change is happening here and now;
- we are at risk of pushing our climate system toward abrupt, unpredictable, and potentially irreversible changes with highly damaging impacts; and
- the sooner we act, the lower the risk and cost.