Elon Musk says Tesla will make ventilators in case of a shortage caused by the coronavirus — here are all the other humanitarian crises he's tried to fix (TSLA)

· Tesla and SpaceX CEO Elon Musk doesn't shy away from a crisis. 
· The billionaire has offered his help on everything from supplying power to Puerto Rico following Hurricane Maria to creating materials for affordable housing. 
· He's also trying to solve more existential problems like climate change and colonizing outer...