What type of air pollution was caused by factories during the industrial revolution

a smoke from burning coal

b soot from forest fires

c smog from high pollen levels

d smoke from vehicle exhaust

the answer is a. laws were enacted in the aftermath of the plot to make it harder to free slaves,increasing sectionalism

a phrase from a poem by ralph waldo emerson about the battle of lexington and concord. emerson's words read, “here once the embattled farmers stood / and fired the shot heard round the world.”