Or a planet made of a mole of moles... https://what-if.xkcd.com/4/
774 karma · joined September 8, 2013
https://www.desmoinesregister.com/story/money/agriculture/20...
"Nitrate levels in Iowa's major rivers have increased more than threefold since the 1950s, but have stabilized — and even slightly declined — in recent decades, according to an in-depth review of available research."