Eutrophication often occurs as a result of:
A. Increased vegetation
B. Excess supply of nutrients, often from fertilizers in run-off water
C. Increased phytoplankton
D. None of the above
查看答案
What is/are (the) major cause(s) of biodiversity loss?
A. Habitat destruction
B. Introduction of invasive species
Climate change
D. All of the above
What percentage of Earth´s water is fresh water?
A. 2,5 %
B. 7 %
C. 17 %
D. 23 %
Which of the following sectors has the most water withdrawal levels?
A. Domestic
B. Industrial
C. Agricultural
D. Energy
Which of the following statements are true with regards to poverty? (Check all that apply)
A. Poverty solely implies living on less than $1.25/day
B. Poverty implies that people are deprived of the freedom to decide over and shape their own lives
C. Poverty is often defined in narrow economic terms (living on less than $1.25/day), but poverty is actually something much wider including the lack of freedom to decide over one’s own future
D. Poverty is a multidimensional concept: food insecurity, lack of health service, denial of dignity are all examples of poverty.
微信支付 
支付宝支付