Who were some famous literary figures that appeared in the 1920s?

Do Green house gasses effect the earths temperatures? How do people adapt to and change the environment? Who has made an impact on peoples lives? What do people throw away and where does it go? Starch molecules present in a maple tree are made from materials that originally entered the tree from the external environment? Definition of agro-industrial waste? Why is Egypt political unrest? What are the negative effects of Scientific management? How much do children get paid in Ethiopia? Why does pure water have a natural pH? How can nuclear waste kill you? What day of the year does summer start? How do you transforme trees into paper? By 1999 after the Clean Water Act had been passed in 1970 the percentage of US surface waters safe for fishing and swimming had increased from 36 percent to? Labor contracts usually inculde the promise of a clean safe work place? What can science do to fix toxic waste? How are human being are harming the environment? What word would you use to describe when someone wont take responsibility for the way their life is going but blames others? Is a toothpick renewable? Why are people trying to minimize the use of fossil fuels?