Sewage sludge can find a second life on farm fields. Here’s how it’s made
What goes down your toilet and drain can end up on farm fields across the United States. Biosolids, or sewage sludge, are the ...
Mashable4 年
'Lunar Loo' challenge asks people to help astronauts poop on the Moon
There's 51 days left to design a NASA toilet fit for Moon-traveling astronauts ... For anyone under 18, the best poop-filled ideas will be considered for a Junior category award and NASA recognition.