Even famous climatologists like Michael Mann use the lie of "this dangerous experiment"; they don't do their own experiments because the results wouldn't further their agenda so they make up an experiment out of history.Hush. But humans release carbon dioxide into the air, too, by burning fossil fuels. This activity has caused the Keeling Curve to creep ever upward since 1958: The lows get a little higher each year, as do the highs.
Because carbon dioxide typically peaks in May, researchers are expecting the Keeling Curve to break a milestone of 400 ppm this year.(If not, the number will almost certainly be reached in May 2014.) As of May 1 of this year, the last day data was available, the Mauna Loa observatory recorded 399.39 ppm of carbon dioxide in the air.
There will be no huge atmospheric or climatic shift once carbon dioxide hits 400 ppm, but the milestone has symbolic significance, said Michael Mann, a climate scientist at Pennsylvania State University.
"It is a reminder of just how uncontrolled this dangerous experiment we're playing with the planet really is," Mann told LiveScience.
P.S. Deniers are liars.
No wonder they believe in the hoax of climate change mitigation and the pseudoscience of man made catastrophic climate change alarmism; their 'scientists' don't even know what an experiment is. Experiments are intended, to prove or falsify a theory. They can't be our daily use of fossil fuels without control.