What planet is it possible for people on earth to live on?

Mars. Scientists predict that humans are expected to plant trees on Mars in 100 years, thus transforming Mars into a green planet in the next few centuries. First, we should raise the temperature of Mars. Although it is only 10 to 15 years before the first manned landing in mission to mars, the experiment of "transforming Mars" to warm the surface temperature of Mars will not be implemented for 50 years at the earliest. As long as they release "insulating" gases like methane or carbon monoxide into the atmosphere of Mars, the surface temperature of Mars can be raised from minus 55 degrees Celsius to minus 5 degrees Celsius, which is very close to the temperature at an altitude of 4,200 meters in the pine-lush Orissa Mountain. Although there are only desolate rocks, a lot of ultraviolet radiation and extremely thin carbon dioxide air on the surface of Mars, human beings have always hoped to find life on Mars. Scientists believe that the polar ice sheet of Mars can melt into the ocean, and the Martian soil also contains many key elements needed for life. When humans release greenhouse gases into the atmosphere of Mars, they can bring bacteria to Mars for photosynthesis. Finally, in the mission to mars, scientists can take tree seeds to Mars by manned landing.