Winds called prevailing westerlies
Dr. Martian Luther king jr.
Answer is : The size of the world's tropical forests will be reduced considerably.
The map let us appreciate the danger of forests Brazil,Colombia,Peru, (America) the Democratic Republic of Congo,(Africa) Indonesia, and Myanmar. (Asia)
The deforestation rates in South America each year tremendously grow, where the Amazon located in Brazil is the most critical area to suffer if the rhytm continues. In fact, the Amazon is the biggest deforestation area in the world nowadays and direct interventions is urgent and necessary to prevent a great ecological tragedy where there is no turning back.
In Africa. the area endangered are mainly the forests of the Democratic Republic of the Congo that stretch into Central Africa. The forests of the Central African region will continue to suffer a great loss if no policies are taken as well as intervention to reverse or reforest the regions that currently could be also by human artifical means repaired. In South East Asia the sitation continues to be quite similar to the rest of the world.
Estimates calculate by year 2030, practically all major forests in the world will have been lost, and as a result uncountable numbers of animal and other species are condemned to extinction.
World War 2 was a war wear people were fighting from all around the world.
Hope that helps you
According some authors which discuss this theme there were some factors as:
1) At the middle of 1850 the Chinese were still under British rule and the conditions were very difficult.
2) The devastation of southern Chinese by the taiping rebellion. This destroyed the rural economy and killed more than twenty millions people.
3) The gold was discovered in California in 1848. It produced a big immigrations at the final of century 17th.