Task: Question Generation
Input (English): Background Paragraph: Recall that air pollution is due to chemical substances and particles released into the air mainly by human actions. When most people think of air pollution, they think of the pollution outdoors. But it is just as easy to have indoor air pollution. Your home or school classroom probably doesn't get much fresh air. Sealing up your home reduces heating and cooling costs. But this also causes air pollution to stay trapped indoors. And people today usually spend a majority of their time indoors. So exposure to indoor air pollution can become a significant health risk. 
Story: Anthony is cleaning his apartment using abrasive chemicals to make sure everything is clean. It is currently winter so his house is sealed up tight to keep it warm.
Output (English): Given that Anthony decides to open his windows after cleaning to let fresh air in, will the amount of air pollution in his apartment increase or decrease?