===== Pollution =====

There's an argument, that sending humans to Mars, will contaminate the planet, so we won't be able to distinguish between possible martian life, or life brought from earth.\\
This article [[https://www.theguardian.com/science/2017/jul/06/mars-covered-in-toxic-chemicals-that-can-wipe-out-living-organisms-tests-reveal|Mars covered in toxic chemicals that can wipe out living organisms, tests reveal]], basically claims that won't be a problem, because anything we bring (including anything brought there so far), will die.