contamination

Grocery stores have been forced to recall some prepackaged salad mixes after tons of people got sick from a baby spinach mix that gave them hallucinations.

Devil's Lettuce

People will really trip on anything these days.

Grocery Stores Alarmed by Spinach Giving Dozens of Customers Hallucinogenic Trips

Environment officials in the UK were stunned after an entire river turned snow white in the south of England, the BBC reports.

Gross

That's not good.

Residents Alarmed When Entire River Turns White

In a new report, scientists discussed how to ensure that space travelers don't contaminate distant planets — and that they won't bring back pollutants.

ET Germs

NASA's Mars samples will be "quarantined and treated as though they are the Ebola virus until proven safe."

Stanford Scientist Warns of Risk From Alien Pathogens

So, what can we do?

A $320 Million Ice Wall Still Can't Contain Radioactive Water Near Fukushima

You will have to make sure no off-world life makes it back to Earth.

Want to Protect Planet Earth? NASA Is Hiring a Planetary Protection Officer

We're polluting our land, seas, and skies.

See Five Kinds of Pollution Illustrated by Images and Video