The Green Revolution did not meet expectations of solving the world's food shortage because the Question 18 options:

farmers could not sell their crops to other countries.

seeds did not increase crop yield as expected.

farming techniques needed to raise the crops were too costly.

All of these are correct.

Depression is lifelong, though you can get medication to with it. the difference between sadness and depression is that sadness lasts a little bit, depression last a long time and it goes on and off. people usually get depression through experiences they have been through, or genetics.

Because without physical activity, the body has extra "energy" if you will, and so when it is time for bed you are not tired, so you end up staying up all night. also there is probably an effect on your internal clock, which messes with your melatonin production which goes hand in hand with your sleep cycle