Tony,
I understand why you "believe" that Man caused Global Warming is real, mostly because that is the predominant story coming out of the media and many in our government; however John makes some good points that I have realized based on rather intensive study of the claims, the data, etc. over the last decade since I retired from a full time job.
I invite you and others to take a personal look at the facts since the science is not settled as claimed and the actual mechanisms that affect our temperature are much more complicated that presented in the main stream media.
The first question to be answered is the warming of the past 120 years caused by man or other mechanisms such as natural cycles. There is no scientific proof that man has caused all or any significant contribution to the observed warming since the late 1800's. Notice that the warming advocates typically start (cherry pick) from the end of one of the recent coldest periods when life on much of this planet was miserable due to the cold. Yes there has been warming since then but how much is caused by man's CO2 emissions? .
Further study reveals some questions that need to be considered and put into historical perspective.
1) We are still (I hope) in an interglacial period where the glaciers have been melting for hundreds of years, many of us are living in a location that were once covered by ice. Yes, glaciers have been melting over a long period.
2) There has been no warming for circa 18 years when one looks at all the "official" data sets even though CO2 has continued to rise significantly while still small. (CO2 is circa 400 ppm or .04% of the atmosphere). The connection between CO2 and temperature rise has been broken. Any rational scientist would be skeptical of the relationship.
3) Even the 2013 UN IPCC AR 5 has significantly reduced it's prediction for temperature rise
http://wattsupwiththat.files.wordpress.com/2014/01/clip_image022_thumb.jpg?w=1204&h=904
"Unnoticed, the IPCC has slashed its global-warming predictions, implicitly rejecting the models on which it once so heavily and imprudently relied. In the second draft of the Fifth Assessment Report it had broadly agreed with the models that the world will warm by 0.4 to 1.0 Cº from 2016-2035 against 1986-2005. But in the final draft it quietly cut the 30-year projection to 0.3-0.7 Cº, saying the warming is more likely to be at the lower end of the range [equivalent to about 0.4 Cº over 30 years]. If that rate continued till 2100, global warming this century could be as little as 1.3 Cº." Has the MSM reported this?
4) The ice in Antarctica is at Record levels.
http://nsidc.org/data/seaice_index/images/daily_images/S_timeseries.png
5) One reason for attempting to sail the Arctic in 2013 was a prediction from NASA scientists in 2008 that the Arctic would be “mostly free of ice by 2013.” Jay Zwally, the ice satellite project scientist at NASA Goddard, said in 2008 that the Arctic appeared to be at a “tipping point” from which there was no return."Arctic ice coverage had rebounded by 60% in 2013, forcing early closing of the passage and trapping sailors and climate tourists. Douglas Pohl, the North West Passage correspondent for Sail World, said the Passage became blocked in late August. “At least 22 yachts and other vessels are in the Arctic,” he reported on Aug. 29. “Some who were less advanced have retreated and others have abandoned their vessels. Still others are caught in the ice, in an unfolding, unresolved drama.”
6) Upon further study I have found that there has been a lot of unethical behavior by those who stand to realize financial reward including "scientists and politicians; e.g., climate gate, phony hockey stick, data manipulation, cherry picking, etc. that make me distrustful of many of the press releases.
Visit wattsupwiththat.com for further study.