Comment on Lightning declines over shipping lanes following regulation of sulfur emissionsparentComments−Scarblac1yOtherwise the sky may realize it's in the control group.−ethanwillis1yI'm more interested in the reason the OP had in mind. I don't think it's required that you have a placebo control group, but the OP might have a reason in mind that's something I haven't considered.
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Otherwise the sky may realize it's in the control group.
I'm more interested in the reason the OP had in mind. I don't think it's required that you have a placebo control group, but the OP might have a reason in mind that's something I haven't considered.