text: To meet the challenge presented by Venus has value, not only because of the insight to be gained on the planet itself, but also because human curiosity will likely lead us into many equally intimidating endeavors. Our travels should not be limited by dangers and doubts but should be expanded to meet the very edges of imagination and innovation.As the years go by there had seemed to be more and more polution in the world. Most of that polution had been seen to be produced by cars, which some people wouldn't know how to live without. However, studies have shown that some cities around the world have actually decreased the usage of cars. A city that has virtually no cars would be Vauban, Germany, and other cities such as Paris, France, Bogota, Colombia, and even some in the United States have joined in the decreasing of car use wagan. In turn of not using cars as much the polution has gone down in those cities.