What are some PSA topics?

Why are CFC Freon and aerosols are becoming less commonly to used? How did workers seek change? How does extreme heat affect the environment? Is ozone good or bad in the trophosphere? Who fought for civil rights? When did marine dumping in the pacific begin? What are 6 major impacts that humans have on the environment? Why does acid rain dissolve statues made of marble CaCO three? What percentage of people can roll their town in a tube? What are the advantages of generating electricity by wind turbines compared with generating it at an oil-fired power station? Is grey water renewable? What is passenger car unit? What is Mount Vesuvius known for? How do I wedgie my cousin as she doesn't know what a wedgie is and I dont want to get into trouble because she tells someone? How does work contribute to society? What do you think we need to do to save the trees? What can people do to use these resources most wisely? Was van gogh bisexual? What was the clean air act's draft year? Sewage is degraded by the process of?