In the 31 countries at the bottom of the list, 28 of which are in sub-Saharan Africa, a person can hope to live on average only 46 years, or 32 years less than the average life expectancy in countries of advanced human development, with 20 years slashed off life expectancy due to HIV/AIDS.
 
        
             
        
        
        
The capital of Saudi Arabia is Riyadh
        
             
        
        
        
To maintain a constant global average temperature, all of the sun's radiation that enters Earth's atmosphere must eventually be sent back to space. This is achieved through Earth's energy balance. ... ~50% of the incoming energy is absorbed by the earth's surface i.e. the land and oceans.
Explanation:
 
        
             
        
        
        
Answer:
I think c
Explanation:
Without access to medicines, Africans are susceptible to the three big killer diseases on the continent: malaria, tuberculosis and HIV/AIDS.