Even at the current order of magnitude of price ($ 200 - $ 300), gas prices are costly. (stellar.org)
Between - group effect sizes were determined by measuring the difference in magnitude of change between treatment and comparison groups in units of standard deviation. (ebmh.bmj.com)
I'll be extremely surprised if you can come up with any warming mechanism that is not at least one or two orders of magnitude more badly correlated with climate than CO2 forcing is. (judithcurry.com)