¿Cómo afecta la contaminación del aire generadas por las actividades humanas al sistema respiratorio de los seres vivos?

We can use solar powered cars or ride bikes instead of cars that burn fossil fuels

The answer to this will be from your lab notes/procedure. it would be best to ask another student who participated in the lab as we do not know what was done, what enzyme or if the temperature is celsius or fahrenheit. if i were to guess though i'd say the rate stopped due to enzyme denturing at high temperature