What is the best way to produce breathable atmosphere beyond planet earth?
Well…i believe everyone else pretty solved the problem for you.We’ re talking about a planets ATMOSPHERE here.To change the gaseous composition of a bell jar is one thing;to completely alter several thousand tonnes of gas(if any atmosphere is even present in the first place),is a bit harder. Lets go planet by planet. Mercury is too hot to even consider inhabiting,but lets assume that some of us want a really quick suntan.Mercury’s position near the sun means its atmosphere is constantly blasted away by solar winds.So an atmosphere is almost impossible to maintain. Venus is basically Earth 200 years from now if our current politicians dont do something about the environment soon.The best way to tackle this would be to use lithoautoprophs,like some bacteria(tough little critters that would just LOVE venus)to suck up that sulphur and turn it into carbon dioxide.From there,algae plants can do the rest in about 10000 years to change the atmosphere to Earths atmosphere. Earth:DUH,the usual