Net benefits at a given level of pollution control __________. Question 29 options: are measured by the vertical distance between the benefit curve and the cost curve at low levels of pollution control, net benefits are large as abatement increases from a low level, net benefits decrease as more and more abatement is done, eventually, the benefits increase more slowly than costs, and net benefits increase as more and more abatement is done all of the above are correct A and D are correct