Atmosphere disappoints warmists: CO2 still not at 400 ppm

May 14 reading only 399.58 ppm.

Here’s the Keeling Curve tweet:

399.58 parts per million (ppm) CO2 in airMay 14, 2013keelingcurve.ucsd.edu

— Keeling_Curve (@Keeling_curve) May 15, 2013