Which is most not likely to help a community reduce its use of fossils fuels

b pllz mark me brainlist im positve its right

Explanation:

r=rho l/a where a is the area, l is the length and rho is resistivity so the greater the area the lesser the resistance thats why the earth pin is thicker bcos current follow the shortest path, so less resistive .

.) the observation by semmelweis that more mothers died of childbed fever when their doctors also worked in the morgue