Strontium 90: One of the radioisotopes of strontium; part of radioactive fallout, harmful to human health.

He made a farcical attempt to save face during the fallout of his sex scandal.

Tom built a fallout shelter.

This way to the fallout shelter.

Countries want to stem the spread of the virus but limit the economic fallout.

Tom has built a fallout shelter.

There was some fallout.

Tom is going to build a fallout shelter.

The primary culprits in eutrophication appear to be excess nitrogen and phosphorus—from sources including fertilizer runoff and septic system effluent to atmospheric fallout from burning fossil fuels—which enter waterbodies and fuel the overgrowth of algae, which, in turn, reduces water quality and degrades estuarine and coastal ecosystems.