The IPCC’s new report confirms previous dire messages, but business doesn’t seem to want to listen
Human influence on the climate system is clear. Scientists are 95% certain that humans are the dominant cause of the global warming that has occurred since the 1950s. The evidence for human influence is even greater than it was just six years ago.
So went the headline findings of the Intergovernmental Panel on Climate Change’s new Fifth Assessment Report, examining the physical science basis for global climate change.
Established by the United Nations in 1988, the IPCC is the leading international body charged with assessing global climate change. The IPCC published its last assessment in 2007 – shortly before the onset of the global financial crisis.
The findings continue. Warming of the climate system is unequivocal, and changes observed since the 1950s are unprecedented. Each of the past three decades has been successively warmer than any decade since 1850. The period 1983 to 2012 was the warmest 30-year period of the last 1,400 years in the northern hemisphere.
The consequences of continuing to emit CO2 are clear, the report says. Not only are we already committed to climate change – due to past, present and future emissions – but further greenhouse emissions will cause additional warming and changes in the climate system. Limiting...