Air pollution is caused the burning of fossil fuels, resulting in the formation of smog and acid rain.
<h3>What is air pollution?</h3>
Air pollution is the release of harmful substances into the air which makes it unfit and unhealthy for breathing.
Substance which pollute the air are known as air pollutants. 
The burning of fossil fuels causes dangerous gases to enter the atmosphere. Heavy, dense fog caused by dangerous gases mixing in the atmosphere is called smog. Acid rain occurs when dangerous gases mix in the atmosphere and fall back to the surface in liquid form.
Therefore, air pollution is caused by releasing pollutants air.
Learn more about air pollution at: brainly.com/question/9420026
 
        
             
        
        
        
If they are decreased at the same time and the same amount is being taken away from them at the same time then the gravitational force would stay the same but if they are be decreased one then the other they will go back and forth
        
             
        
        
        
 Cardiac output, peripheral resistance, hormonal changes coming from glands, blood volume & blood viscosity
        
             
        
        
        
Answer:
no it is a chemical that we drnik 
Explanation: