Man-made climate change IS real, however, the actual temperature changes man contributes is likely at an insignificant rate compared to natural cyclical weather changes. Regardless, even a minute temperature change can cause dramatic changes in the ecosystem.
I would be much more concerned with deforestation, desertification, poisoning of fresh water supplies, fracking, overfishing, soil erosion and animal extinction....all things that man has an irrefutable link to....than whether our CO2 carbon emissions is producing a .1 atmospheric temperature increase.