from Limits to Growth: The 30-Year Update, Donella Meadows et al. 2004
“Scientists do know that there have been temperature upheavals on earth in the past …
“But the most important message … is that current atmospheric concentrations of carbon dioxide and methane are far higher than they have been for 160,000 years. … There is a significant disequilibrium in the global atmosphere, and it is getting exponentially worse.” p119
