"I am a skeptic. Global warming has become a new religion. I am Norwegian, should I really worry about a little bit of warming? I am unfortunately becoming an old man. We have heard many similar warnings about the acid rain 30 years ago and the ozone hole 10 years ago or deforestation but the humanity is still around. The ozone hole width has peaked in 1993." --Ivar Giaever, WSJ, 2008
Dr. Giaever is a Nobel laureate. He is a global warming "skeptic". He is also a deceiver. We did, in fact, have warnings about acid rain 30 years ago. The EPA responded by creating a cap-and-trade system for sulfur dioxide. Sulfur dioxide emissions have dropped 40% as a result of this and other actions. The ozone hole did not peak in 1993. Production of CFCs peaked in 1993, with the adoption of the Montreal Protocol. Unfortunately, CFCs persist in the atmosphere for decades. The ozone hole continued to increase in size, with the peak occurring in 2006.
I have no doubts of Dr. Giaever's qualifications in the field of superconductivity. He should leave climate science to others.