Because good quality science says it's not even possible.
No Smoking Hot Spot (The Australian)
That article takes Greenhouse Theory at face value and by the criterion set up in the theory itself finds no evidence of warming on the basis of greenhouse effect.
The Hidden Flaw in Greenhouse Theory
Falsification Of The Atmospheric CO2 Greenhouse Effects Within The Frame Of Physics
Harvard astrophysicist dismisses AGW theory, challenges peers to 'take back climate science'
It Is Impossible For A 100 ppm Increase In Atmospheric CO2 Concentration To Cause Global Warming
Those four articles each show that Greenhouse Theory has no basis in reality due to a direct conflict with the known laws of physics. No wonder the smoking gun "hotspot" can't be found.
Claim That Sea Level Is Rising Is a Total Fraud
That article pretty much puts the kibosh on any serious trend of planetary warming from any cause. Think about it. If there is absolutely no sign at all of rising sea levels how could the planet be warming? Beyond the centuries long slow warming of the earth and rising of the seas of course. But that is only a few millimeters per century due to the inter-glacial period we are in.
Thank you for your continued TRUTH regarding this hoax!