DOES THIS OBSERVATION REFUTE THE GREENHOUSE EFFECT?

This piece makes a very interesting observation about the surface temperature of earth. The GHE hypothesis has a testable result which is well-accepted by its proponents.  It is that if there were no greenhouse gases capable of absorbing the radiation being emitted by the earth’s surface due to its temperature, the earth’s average temperature would be about 33^oC less than its observed average temperature.  So, all one has to do to prove the GHE hypothesis to be false is to refer to observations of the earth’s natural system which demonstrate that the earth’s average temperature cannot be less than that which is observed. You can click on the link and read the article to follow the argument which I found interesting.