Former NOAA Administrator suggests that trace amounts of CO2 may result in an "inhospitable planet Earth" by the end of the century

CapitalClimate: Former NOAA Administrator: "Bleak Assessment"

History shows that changes in energy-capital infrastructure take decades; barring a technical miracle, the concentration of greenhouse gases will likely double or triple by the end of the century, bringing a new and  rife with extreme weather and other climate disruptions.