Summary: Now that the alarmists have had their day trumpeting the IPCC’s worst case scenario (it’s unlikely and becoming more so), let’s look at their best case scenario (hidden by journalists). The risk probabilities are asymmetric: the good news is more likely than the bad news. This is inspirational, telling people that we can make a better world.
“We tend to overestimate the effect of a technology in the short run and underestimate the effect in the long run.”
— Attributed to Roy Charles Amara as paraphrased by Robert X. Cringely.
The IPCC’s AR5 used four scenarios to discuss the future of climate change. These Representative Concentration Pathways (RCPs) describe trends for future emissions, concentrations, and land-use, ending with radiative forcing levels of 2.6, 4.5, 6.0, and 8.5 W/m2 by 2100. The worst case is RCP8.5. It assumes ugly changes in long-standing trends of population growth and technological development. It is unlikely…
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