That's a logarithmic scale, it's not "awful". The human contribution to the CO2 emissions has been extremely well-measured for a very long time, and the greenh

That's a logarithmic scale, it's not "awful". The human contribution to the CO2 emissions has been extremely well-measured for a very long time, and the greenhouse effect has been understood by almost 150 years. The rate of increase is anthropogenic. There is no natural system on Earth, including plate tectonics, that remains untouched by human industry. Regardless, "natural" does not mean "good." A solar system in its natural state is devoid of life.