RT @kprather88:
»We drink 2-3 L of water a day.
Water can contain pathogens.
We filter our water.
We breathe 11,000 L of air.
Air can contain pathogens.
We do not filter our air.
Why not?«
RT @kprather88:
»We drink 2-3 L of water a day.
Water can contain pathogens.
We filter our water.
We breathe 11,000 L of air.
Air can contain pathogens.
We do not filter our air.
Why not?«