text: Finally, all these sources have explained that a non motorized vehicle is for the best in our health and in our enviornment. it is a new and innovatied way that is being accepted by a numerous amount of the population.    The author has great supports about why we should study the planet of Venus. He called it Earth's twin. He stated that Venus is the closest planet to be comapred to Earth. The author states that blimp-like vehicles would help with the study of Venus.