By my calculations CO2 accounts for at most 50% of the climate changes over the past century. The rest is a result of natural process that move the planets temperature up and down over a thousand some year cycle. We are current near the peak of the current cycle which bottomed out around 1650. Those of us that do not believe that CO2 is a pollutant do not believe that it has no effect on the Climate, for it does, its just not as much as the IPCC and their minions think!
Re-Post from Breitbart by Robert Wilde 10 Jul 2014
According to The Economist, The Heartland Institute is “the world’s most prominent think tank promoting skepticism about man-made climate change.” On Wednesday, several scientists gathered at the institute’s 9th International Conference on Climate change to address a variety of issues including the biological effects of increased CO2 on the planet due to human activity.
Dr. Craig Idso, the founder, former president, and current chairman of the board of the Center for the Study of Carbon Dioxide and Global Change, provided a plethora of information on exactly how CO2 affects the environment. Global warming alarmists should be comforted that they have a lot more to be happy about and should not be fretting that global catastrophe is knocking at the door.
Idso pointed out that there is a huge body of literature on the biological impacts of rising temperatures and atmospheric CO2 levels that the International Panel on Climate Change (IPCC) ignores. He emphatically stated that atmospheric CO2 is not a pollutant. In fact, increased levels of CO2 reduce the negative effects of a number of plant stresses including: high salinity, low light, high and low temperatures, insufficient water, air pollution, and protects against herbivores i.e. being eaten by animals and insects.
Notably, Dr. Idso emphasized that the increased CO2 levels allow plants to produce the same amount of crop yield with less water. Moreover, plants are able to grow in dry areas where it had been previously too dry to exist. A collateral benefit to this is that the increased vegetation reduces the effects of soil erosion.
Perhaps Idso’s final conclusion should make all those who fear that global warming and increased CO2 is adding to the demise of the planet that everything is going to be OK: he claimed it is far more likely that CO2 proliferation will increase regional biodiversity and will contribute to the expansion and proliferation of animal habitats.
Centinel2012 
And don’t forget that you are extracting that conclusion from someone who received funding from a conservative and libertarian thinktank. While we could anticipate the increase in plant diversity in certain regions, it could also be argued that as the weather becomes increasingly extreme, some crop fields may become drier than the plants can tolerate (even under high CO2 settings). In any case, it remains to be seen whether the dramatic increase in anthropogenic CO2 in the atmosphere over the last decades is, in overall, good or bad.
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Actually I do my own research using NOAA and NASA data only; all my work is independently done with no outside interest. I took Climatology, Geography, Chemistry, Physics, calculus and lot of statistics which I used when working as an engineer for GE. What I publish here is not related to the UN IPCC nor a conservative or libertarian group. When I finished my work in 2007 my model showed that we were already starting a reversal in the upward movement in global temperatures which has continued and will continue until ~2035 when it will turn up again. The build up of CO2 is real but is not the primary driver there are other areas that have historically moved temperatures up an down; The little Ice age that we are still recovering from and prior to that the medieval warm period. CO2 does play a part just not as much as the believers think; and in fact most of the current scientific papers support the lower effect not the higher by a factor of 1/3. Read my latest analysis at https://centinel2012.com/2015/03/19/analysis-of-global-temperature-trends-february-2015-whats-really-going-on-with-the-climate/
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