A lot of problems exists and for some of them like pollution or transport, or the bacterias or virus that affect us, we HAVE a solution !
Biologists and engineers have come to a common groud. Buildings can't continue to polute that much. Air conditionning systems and the systems to keep your house warm are good for us but not for the environment because it creates a lot of carbon dioxyde in the air. It's the case in a big mall in Africa where the air conditionning systems are inspired by termite's mounds. Those little insects create small holes in their mounds to let the air pass in there. In hospitals, they are inspired by shark skins, because bacterias can't fix in it. So they want to put it in hospitals in order to protect ramps, beds and stairs.
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