Earth's early atmosphere had no reducing gases (Talk.Origins)
Reducing gases likely were not present in the early, prebiotic earth's atmosphere.
- Discovery Institute. 2003.A preliminary analysis of the treatment of evolution in biology textbooks currently being considered for adoption by the Texas State Board of Education.
- Wells, Jonathan. 2000. Icons of Evolution. Washington DC: Regnery.
This is a straw man argument, since this is not what the cited sources say. They say that the simulated atmosphere of Miller’s experiment, "was probably more strongly reducing than the actual atmosphere of the early Earth."