Verified Answer :

Unsafe working conditions ( limbs got amputated)
Pay was low
Lots of pollution released into the atmosphere ( caused global warming)
Child labour

kaitlinsierras

Answer:

The specific answer you are looking for is B. Increased air pollution in cities

Explanation:

This was due to the factories and railways and the CO2 polluting the air, bad smells and loud noises were also negative effects. (I appreciate Brainliest if you can)