By Una Galani
The author is a Reuters Breakingviews columnist. The opinions expressed are her own.
James Hansen’s latest press conference was positively scary.
NASA’s former chief climate scientist (he recently left government to pursue a more activist role) met with environmental journalists last month at Columbia University to release a new study with the ominous title, “Assessing Dangerous Climate Change: Required Reduction of Carbon Emissions to Protect Young People, Future Generations and Nature.”