text: These ideas have been expressed to reduce the usage of cars. Using cars less will have a huge effect on the ozone and how much pollutant is in the air.                    "The Challenge of Exploring Venus", this is a challenge because of Venus's reputation. Venus is the closet planet to earth due to density and size, it orbits the sun at a different speed. Because Venus is Earth's neighbor, somebody wanted to explore it. Trying to explore Venus has failed for over three decades. In paragraph 2 it writes, "and for a good reason, since no spacecraft survived the landing for more than a few hours." The author came to the conclusion that Venus had a reputation that's challenging for humans to study. The author writes, " A thick atmosphere of almost 97 persent of carbon dioxide blankets Venus. On the planet's surface, temperatures average over 800 degrees Fahrenheit, and the atmospheric pressure is 90 times greater than what we experience on our own planet." Humans can not survive in carbon dioxide, Venuns's air isn't breathable, the pressure that it has keeps and spacecraft from leaving after it comes in. Paragraph 2 explains "These conditions are far more extreme than anything humans encounter on Earth; such an environment would crush even a submarine accustomed to diving to the deepest parts of our occens and would liquefy many matals." Venus is so hot that it will melt the finest metal into liquid.