"The flooding in Louisiana in the eighth event since May of last year in which the amount of rainfall in an area in a specified window of time matches or exceeds the NOAA predictions for an amount of percipitation that will occur once every 500 years." -- The New York Times, Aug. 16. 2016

In other words, once every 500 years happened eight times in 15 months.

Atmospheric CO2 Growth Rate per Decade

2005 - 2014 2.11 parts per million per year

1995 - 2004 1.87 ppm per year

1985 - 1994 1.42 ppm per year

1975 - 1984 1.44 ppm per year

1965 - 1974 1.06 ppm per year

1959 - 1964
(6 years only) 0.73 ppm per year

-- National Oceanic and Atmospheric Administration