Homeland Security Secretary Kristi Noem says the entire southern border wall with Mexico is being painted black to deter illegal immigration, at President Trump's request.
Only thing I can think of is the black paint would absorb more solar radiation and make it hotter. But the sun isn’t out at night which is when many people make that crossing, so I’m not sure they’ve really thought it through.
Only thing I can think of is the black paint would absorb more solar radiation and make it hotter. But the sun isn’t out at night which is when many people make that crossing, so I’m not sure they’ve really thought it through.