EARTHLIFE SURVIVAL
One lifeform on this planet
[and on the next – and probably on Mars-Midway [in “grounded-space-stations”]]
needs now
and will need longest-term thousands “nay millions” of years
just one lifeform-“living” [i.e. life-supports]
each
which for the individual human-being is
one-human-living
= approx £300’s-worth per week [no more : no less]