Answer:
Formaldehyde can be added as a preservative to food, but it can also be produced as the result of cooking and smoking. Formaldehyde also occurs naturally in the environment. Humans and most other living organisms make small amounts as part of normal metabolic processes. Formaldehyde is also a byproduct of combustion. When burning natural gas, kerosene, gasoline, wood, or tobacco, formaldehyde is produced. Automobile exhaust is a common source of formaldehyde in our environment. Tobacco smoking in the home is another source of the chemical in the indoor environment.
Explanation:
Coal-burning factories and increased automobile usage has caused the greatest increase in "<span>A) air pollution," since in fact coal when burned is one of the worst pollutants. </span>
Answer:Britan, France and Spain owned the land west of cumberland gap
Explanation:
France was the least prepared country for war at the start of WW2 because they had a small army and been totally obliterated in WW1
<em>A statement about the industrial revolution and capitalism that's true is;</em>
C. New technology made production much more efficient.
<u>A feature of the Industrial Revolution has been the advance in power technology. </u>
<u>At the beginning of this period, the major sources of power available to industry and any other potential consumer were animate energy and the power of wind and water, the only exception of any significance being the atmospheric steam engines that had been installed for pumping purposes, mainly in coal mines. </u>
