The Mongol invasions of Japan failed because Typhoon winds destroyed the Mongol fleet. The Mongols failed to conquer Japan even though they had successfully conquered the much larger land of China and also Korea. The typhoons that saved Japan did not even happen just once but twice ! Both times that the Mongols set out to conquer Japan, their fleets were destroyed by typhoons. Japan was geographically in luck and also helped by nature.
It spread through via international airline travel very quickly.
Smith is also known for creating the concept of gross domestic product (GDP) and for his theory of compensating wage differentials. 2 According to this theory, dangerous or undesirable jobs tend to pay higher wages as a way of attracting workers to these positions.
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Answer:
1.Afforestation- This means more trees should be planted as these trees are important in purification of the atmosphere and makes clean and more volume of oxygen available.
2. Pollution should be reduced at every cost in order to make all the inhabitants of the environment perform optimally and decreasing risk of diseases and death.
3. Natural resources should be saved and not depleted in a rapid form or way.
4. Water should be conserved and used efficiently to prevent periods of droughts which leads to famine,hunger and death.
