Lack of pioneering skills among the settlers.
electricution
Some minor problems can be muscle stiffness, sore breasts (both occasionally) but nothing too serious.
A serious economic crisis
A serious economic crisis
It became a major problem because it solved no problems but created many enormous and serious problems itself.
A serious economic crisis
Rome
its a problem because it can spill during transportation.
Dreams occur during sleep. If you see something or someone who is not actually present while you are awake, that is a "delusion," and means that you need to contact a medical professional immediately. Delusions can be caused by serious health problems that can be very dangerous.
Coal caused health problems because it was used extensively in the cities in factories and houses. Emissions included sulphur and nitrous oxides which polluted the air and caused asthma, bronchitis and lung disease.
Emotional problems to the soldiers and their families. Bankruptcy to the nation.
c. DDT