LogFAQs > #931115295

Nope, this warming is unprecedented and man made

https://imgur.com/NguDoNr

We observe that radiation from the sun to earth has been overall steady or very slightly decreasing over the past five decades, yet the amount of energy reflected from Earth back to space has been decreasing over that same period. In other words, were seeing clear evidence that our atmosphere is becoming more insulating, decade after decade. This change (less and less energy getting from Earth into space) is very clearly increasing every decade, at least since the beginning of the space age.

Regarding the cause of this increasingly insulating atmosphere, a careful look at the space- and ground-based radiation spectra directly shows the increasing influence of carbon dioxide. For example, outgoing radiation (Earth to space) is decreasing especially at CO2 absorption wavelengths. It is an undeniable fact that we are witnessing an increasing greenhouse effect due to increasing CO2.

Regarding the source of the increasing CO2, nearly all of the recently added and continually rising CO2 in our atmosphere has the isotopic signature of burned fossil fuels (as opposed to e.g., volcanoes). This is totally consistent with our collective emissions of about 40 billion tons of CO2 gas per year (and rising), which is way more than what all volcanoes emit (around 0.3-2% of that amount).