How to tell if a solution is hypertonic hypotonic or isotonic?

Which of the following mining methods disrupts the sea floor?

What type of reaction fuels the processes seen here?

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.