be so polluted b)a flying vessel that can travel to the moon

exist c)have the money you need to pay for smth

mini-submarines d)when cars are stopped in the streets because there are too many

of them

moon-shuttle e)not be the same

have enough money f)small ships that travel underwater

believe g)substance that produces energy when burnt

traffic jams h)think

fuel i)be very dirty

cause pollution j)to make the environment dirty