Can we live on the surface of mars? why or WHY NOT

No , we can not . The surface of Mars isnt hospitable to humans or most known life forms due to the radiation, and greatly reduced air pressure with a thin atmosphere and reduced sunlight, it can be difficult to get anything to grow. Human survival on Mars would require living in artificial Mars habitats with complex life-support systems.The atmosphere of Mars is mostly carbon dioxide, the surface of the planet is too cold to sustain human life .

an angle + its complement = 90 degrees

the first phase of the government’s plan for settlement was building the transcontinental railroad. the railroad provided a way to bring settlers and manufactured goods west and ship their agricultural and mining produce east. the transcontinental railroad was an essential artery for rapid development of the frontier.

the second phase of the government’s plan was a liberal land distribution policy that made it possible for many people to homestead. with these two key elements—transportation and cheap land—the government rapidly achieved its goal of persuading people to move west, settle on farms, and push back the frontier.