Nova (stylized NOVÎ») is an American popular science television series produced by WGBH Boston. It is broadcast on Public Broadcasting Service (PBS) in the U.S., and in more than 100 other countries. The series has won many major television awards.Nova often includes interviews with scientists doing research in the subject areas covered and occasionally includes footage of a particular discovery.t is broadcast on Public Broadcasting Service (PBS) in the U.S., and in more than 100 other countries. The series has won many major television awards. Nova often includes interviews with scientists doing research in the subject areas covered and occasionally includes footage of a particular discovery.
So deflation exerts a depressing effect on spending by raising debt burdens â which, as Fisher also points out, can lead to another kind of vicious circle, in which depressed spending because of rising real debt leads to further deflation.
There are a number of different causes/mechanisms behind the process, such as deflation (the loss of stabilizing vegetation, and of top soil); erosion; and soil-salinity-rise (via irrigation mostly).