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"Greenhouses probably won’t work on Mars"

Mars is a lifeless wasteland for more than one reason.  Not only are the temperatures and lack of water difficult for life to deal with, the lack of a magnetic field means radiation constantly pummels the surface.  If humans ever plan to spend prolonged periods of time on the red planet, they’ll need to support an additional type of life – crops.  However, it appears that even greenhouses on the surface won’t do enough to protect their plants from the deadly radiation of the Martian surface, at least according to a new paper published by researchers at Wageningen University and the Delft University of Technology.

Ideally, agriculture on the Maritan surface would consist of greenhouse domes and allow what limited sunlight hits the planet to make it through to the crops they house directly. However, current technology greenhouse glass is incapable of blocking the deadly gamma radiation that constantly irradiates Mars. Those gamma radiation levels, which are about 17 times higher on Mars than on Earth, are enough to affect crops grown in greenhouses on the surface significantly.

The researchers ran an experiment where they planted garden cress and rye and measured the crop output of a group irradiated with Martian levels of gamma radiation with those grown in a “normal” environment with only Earth-level radiation.  The crops in the irradiated group ended up as dwarves, with brown leaves, and resulted in a significantly decreased harvest after 28 days of growth.

Read the complete article at www.universetoday.com.


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