What would sky color be with a Proterozoic earth during the "Boring Billion (1.8 By-0.8 By) with a Canfield (Euxinic) ocean and a high atmospheric concentration of colorless hydrogen sulfide and very low atmospheric oxygen? Would it really be a light green as proposed by Professor Peter Ward in his book Under a Green Sky, which he states but did not provide a rationale? Thank you.
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Sky color of a proterozoic earth with a Canfield ocean