4) explain the technologies available for the treatment of acid mine drainage. why are the different techniques referred to as "active" and "passive" treatments? what options are available for the treatment of acid groundwater? what treatment options are available in the presence of ferric iron (fe3+)? (0 5) describe the wastes that accumulate at phosphate mines.

answer: we dont knowww

explanation:

i would expect light rain in pittsburgh throughout the following 24 to 48 hours. the lower/falling weights in urban areas toward the west demonstrate that a low weight framework is moving from west to east toward pittsburgh. low weight frameworks are ordinarily connected with precipitation. the way that you don't see a major drop in temperature in the more western urban areas demonstrates the low weight framework is moving with a warm front, so just light rain would be normal. substantial downpours or progressively vicious climate is just typically connected with chilly fronts, where the warm air is pushed up and over a cool front quickly. this quickly rising air (convection) is what gives you heavier torrential downpours, and other conceivably serious weather conditions.

an economic of depression