that cause malaria, a leading cause of death in many countries. This exogenously caused reduction in mortality led to very rapid rates of population growth in most third world countries, creating what became known as the "population bomb." It also left these poor countries without a basic healt...
In the coming years, as India becomes more and more urbanized, urban areas will play a critical role in sustaining high rates of economic growth. Due to urbanization there has been growth observed in the vehicular population in India, giving rise to elevated levels of traffic related pollutants...
This article challenges the conventional wisdom that post-1950 population growth, leading to extensive deforestation of the Himalayas, is the cause of catastrophic flooding of Bangladesh and northern India. It is argued that, until the subsistence mountain farmer can be regarded as part of the ...
4.细节题。根据文章最后一段1,2行Half of urban land expansion in China is driven by a rising middle class, whereas the size of cities in India and Africa is driven primarily by population growth.可知中国的城市人口变多是因为中国的中产阶级变多,而非洲则是因为人口的迅速增加。故A正确。 考点:考...
根据最后一段Half of urban land expansion in China is driven by a rising middle class,whereas the size of cities in India and Africa is driven primarily by population growth.(中国一半的城市土地扩张是由不断壮大的中产阶级推动的,而印度和非洲的城市规模主要是由人口增长推动的。)可知,非洲的城市变得...
Grass- land plant biomass is controlled by interdependent factors that vary in space and time4, including climate3,5, the availability of growth-limiting resources, such as nitrogen and phosphorus6,7, and plant interactions with herbivores8. However, human activ- ities are altering these processes...
Poverty. Even when population growth was not a factor, poverty was the most common reason why parents killed their offspring. In ancient Greece and Rome, parents who could not afford to raise their children disposed of them, particularly during times of war, famine, and drought. At times chil...
Dust evolution simulations were performed using a modified version of the code Two-pop-py5, publicly available at https://github.com/birnstiel/two-pop-py, with modifications described in ref. 20. N-body simulations modelling the growth of planetesimals to planetary embryos were performed using L...
Suicide, perhaps the most obvious type of avoidable death at any age, is an intentional act that quickly results in death. However, there is a wide range of indirect suicidal behaviors in which death results gradually rather than immediately, and in which the degree of intentionality is less ...
grapples with questions of immigration reform, border security, and an ever-increasing visa backlog, neighboring Canada is experiencing immigration-related changes of its own. Unlike the U.S., where population growth has steadily declined for decades, Canada is seeing the fastest population growth ...