19. A typical H2-O2 PEMFC operates at 0.8 V and a fuel utilization of 88% at STP. What is the efficiency of such a fuel cell

Pastoral farming is best described as a. a method of raising livestock and moving herds b. an african method of agriculture c. a method of cultivating crops on poor soils d. a common method of desert farming select the best answer from the choices provided a b c d