text: A reason Venus is a dangerous place is the atmosphere is almost 97 percent carbon dioxide. Venus has challenging clouds that are highly corrosive sulfuric acid. The temperatures average over 800 degrees Fahrenheit. The atmospheric pressure is 90 times greater than what we feel on our own planet. How we know this informaiton can help understand that the author thinks venus has some dangers on it. For example , " These conditions are far more extreme than anything humans encounter on earth ; such an enviroment would crush even a submarine accustomed to diving to the deepest parts of our oceans and would liquefy many metals. "