claim: The consequences of climate change become increasingly bad after each additional degree of warming, with the consequences of 2°C being quite damaging and the consequences of 4°C being potentially catastrophic.
evidence: An elementary calculation for a dilute gas at temperature T {\displaystyle T} and density ρ {\displaystyle \rho } gives μ = α ρ λ 2 k B T π m , {\displaystyle \mu =\alpha \rho \lambda {\sqrt {\frac {2k_{\text{B}}T}{\pi m}}},} where k B {\displaystyle k_{\text{B}}} is the Boltzmann constant, m {\displaystyle m} the molecular mass, and α {\displaystyle \alpha } a numerical constant on the order of 1 {\displaystyle 1} .