I think that Nasa should focus its future missions on planets that we humans have a chance of surviving on or that has the basic necessities for the sustenance of life. I believe that this is the case because of global warming and pollution the Earth will soon be uninhabitable, thus we have to look up to the sky and explore the rest of space. For example, multiple scientists believe that on one of Saturn’s moons (Titan) there might be water or any signs of life. Other planet’s that could serve as candidates for our future home could be Mars. Chinese scientists have already succeeded in growing cotton on Mars and as our technology progresses we will be able to also terraform planets for us to inhabit and for us to live on.