Hindi (romanized): prithvi kii sataha se 60 mile (100 ki.me.) upar hawa kii rasinic sanrachana bahut zyada oonchaai par nirbhar karti he or vayumandal main halki gaison (aanvik oxigen, helium or hydrogen) kii maatra bad jaati he.
English: Above 60 miles (100 km) from Earth's surface, the chemical composition of air becomes strongly dependent on altitude and the atmosphere becomes enriched with lighter gases (atomic oxygen, helium and hydrogen).