Why is potash important to the worlds food supply

If a swimmer is traveling at a constant speed of 0.85 m/s,how long would it take to swim the length of a 50m olympic sized pool?

In 1866, a mob in which tennessee city attacked local african americans and burned down homes and schools?

The most effective way for individuals to influence the outcome of the protectiveequipment proposal is toa.b.c.d.circulate a petitionjoin a political partymake a presentation to the school boardwrite a letter to their provincial government representative