Climate change deniers are absolutely opposed to the idea that greenhouse gases produced by our modern lifestyle and industries are creating climate change. They often assert that it's normal fluctuations - like the temperature of the sun - or other man-made effects like deforestation that are causing the 1.4 degree rise in temperature. A stunning infographic shared recently by Bloomberg #News
shows just how unimportant any of those factors is. The graph shows that the observed temperature has risen 1.4 degrees F. from a baseline in 1880. So what accounts for the rise?
As the earth wobbles on its axis the fluctuations cause ice ages and warming periods. But there's no evidence we're in a warming axis. Since 1880, the effect of orbit wobble has been negligible. Ditto with solar temperature. The sun's heat has varied in tiny increments since 1880 but on average is virtually the same. Volcanoes emit some CO2 but 1/100th as much as industry. In fact sulfur emissions actually cool the temperature by blocking sunlight.
Adding all three natural factors together has a slightly larger impact than any individual factor but it's tiny compared to the temperature change.
Other Human Factors?
Does deforestation add to warming? Actually, cutting down greenery causes more reflection of light back to the atmosphere. Which is why people suggest things like white asphalt. Deforestation marginally decreases temperature.
Ozone pollution marginally increases temperature, a tiny amount. Aerosol pollution substantially decreases temperature. Still, we don't want energy from burning coal - it causes acid rain!
If not for the cooling effect of the other factors, the temperature rise would be even higher due to gases. CO2 has risen 40% since 1750. NASA concludes: It really is greenhouse gases. The study was done by NASA's Godard Institute for Space Studies, using ModelE2, a simulation program run on a supercomputer and containing more than 500,000 lines of code.