The jury is out as to the long term implications of rising cO2 on the climate. We are certainly experiencing global warming, especially now!? What still needs to be understood is what is causing the warming .. trends and cycles of sun spots, changes magnetic fields on the sun, or composition of gases on earth and the green house effect?
http://joannenova.com.au/2012/01/global-cooling-coming-archibald-uses-solar-and-surface-data-to-predict-4-9c-fall/