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:
So history doesn't repeat itself.
Answer:
The living situation in slums was bad and an unhealthy environment especially for children.
<u>Explanation:</u>
Living in a bad situation indicates that the people need some resources and supplies for their families. Boys should handle this tough situation in serving their families.
So they loitering in the streets resulted in being captured by police and they will be sent to the reformatory. This reformatory suited for the people having a negative mind and it doesn't improve the lives of young people.
Answer:
As with Greek sculpture, the Romans worked stone, precious metals, glass and terracotta but favoured bronze and marble above all else for their finest work. However, as metal has always been in high demand for re-use, most of the surviving examples of Roman sculpture are in marble.
Explanation:
Answer:
C)
spread of disease pathogens among urban populations
Explanation:
