by Janet Ritz
Cross-posted at The Huffington PostNASA climate scientist, James Hansen, has published a paper with a warning that the long-term increase in temperature, which may be between 3 and 6 degrees Celsius (10.8 degrees F), brings us "dangerously close" to climate tipping points:
The Earth’s history provides a sobering perspective on prospects for climate change. The Earth’s climate is sensitive to changes in climate forcings, human-made forcings now overwhelm natural climate forcings, and the climate system is dangerously close to tipping points that could have disastrous consequences.