text: In conclusion the advantages of limiting cars had a far greater output than input and has also solved many big problems. All we canhope for is the parcipitation of more and more countys or cities to help lives and our world.    In the article "The Challenge of Exploring Venus" a writer states that scientists are trying to study the planet Venus. In his article, he claims that while it is very risky, it may be worth it in the end. he also gives details about how dangerous it really is, and what the planet might have been at one point in time.