Biological warfare, also known as germ warfare, is the use of biological toxins or infectious agents such as bacteria, viruses, insects, and fungi with the intent to kill, harm or incapacitate humans, animals or plants as an act of war.
The second one because nobody really cares who is was written for
I don’t know what this means
Try changing your location to what I am guessing is Russia
They didn't because they weren't focused on it. It was the age of technological advancement, industry, wild parties and rich city slickers. The so called roaring twenties. Everyone was focused on factories and development that they didn't pay attention to the farmers.
<span>The railroads had to pass through mountains and rivers.</span>