Earth has an atmosphere which requires a lot of fuel to escape from. There is no such atmosphere on the moon. On the return journey, once you enter Earth's gravitational field, you let gravity do the rest, just have to make sure the heat shields can withstand the re-entry otherwise you end up like
Columbia space shuttle.
ok but still doesnt answer the question. then why after 50 years and so much technological advancements and $$$ but still not a single trip from any of the superpowers, usa, russia, china, france, uk....you would think those other countries would also like to rival match usa's feat right?