An air sample in the lungs contains oxygen at 97 mmHg, nitrogen at 557 mmHg, carbon dioxide at 32 mmHg, and water vapor at 49 mmHg. What is the total pressure, in atmospheres, exerted by the gas mixture?

Harry lives in a city, and he has a lung condition known as asthma. on certain days, harry has to stay inside because pollutants in the air make it difficult for him to breathe. which of these pollution sources are nonpoint sources that might bother harry if he goes outside? choose the two that apply.