The weatherizing of buildings to reduce heat loss and save on fuel costs has led to an increase in А
global warming.
B
acid rain.
С
ozone depletion
D
indoor air pollution.

global warming

Explanation:

Global warming is simply referred to as the long-term heating of the surface of the Earth and this is caused by human activities, and also the burning of primarily fossil fuel, which brings about the pumping of carbon dioxide, greenhouse gases and air pollutants into the atmosphere.

The weatherizing of buildings to reduce heat loss and save on fuel costs has led to an increase in global warming.

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.

sorry to break it to ya but no one can answer your question it's just

jk but i am serious about the part that most people cant answer it beacuse you did not mention the section you are talking about. but it would if you added some detail and were a bit more specific.