Considering cyclical warming usually played out in fairly long time frame, even possibly with multiple periods nested, whatever contribution of man-made CO
2 so far is so minuscule that it may be indistinguishable. Cosmic dynamics, i.e. sun's output, slow wobble of earth axis, ocean dynamics, volcanic activities(on the ground and under the sea) plays out in various periods which are quite long from human perspective.
With even so much technological development, our impact on earth is still puny compared with that of nature. Nature is immensely vast both in time and space.
5 posted on
10/29/2009 10:29:13 PM PDT by
TigerLikesRooster
(LUV DIC -- L,U,V-shaped recession, Depression, Inflation, Collapse)