The science clearly shows an increase in global temperatures over the last century. What the science does not clearly show is that this increase was caused by man. Many people attribute the global warming to an increase in carbon dioxide (CO2) in the atmosphere. But the concentration of CO2 in the atmosphere is 0.037%, up from 0.027%. That means, out of every 10,000 molecules of air, we now have 1 more molecule of CO2. This one additional molecule per 10,0000 has, in theory, caused the global temperature to increase by 1-2 degrees fahrenheit.
Meanwhile, every single day from the time the sun breaks over the eastern horizson until late afternoon, the temperature goes up 20 degrees fahrenheit.