( ( ( The ( main reason ) ) ( ( the Moon ) ( is ( so ( different ( from Earth ) ) ) ) ) ) ( ( is ( because ( ( the Moon ) ( has ( no atmosphere ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (JJ main) (NN reason)) (SBAR (S (NP (DT the) (NNP Moon)) (VP (VBZ is) (ADJP (RB so) (JJ different) (PP (IN from) (NP (NNP Earth)))))))) (VP (VBZ is) (SBAR (IN because) (S (NP (DT the) (NNP Moon)) (VP (VBZ has) (NP (DT no) (NN atmosphere)))))) (. .)))
The main reason the Moon is so different from Earth is because the Moon has no atmosphere.
(ROOT (S (NP (CD One) (NN way) (SBAR (IN that) (S (NP (DT the) (NN moon)) (VP (VBZ is) (ADJP (JJ different) (PP (IN from) (NP (NN earth)))))))) (VP (VBZ is) (SBAR (IN that) (S (NP (DT the) (NN moon)) (VP (VBZ has) (NP (RB almost) (DT no) (NN atmosphere)))))) (. .)))