20 The beneficial environmental effects of such new products are still dwarfed by the sheer volume of emissionsthat heavy industry spews out.
(A)Heavy industry is still so dominating that environmentalists fail to do anything to alleviate the damage caused by it.
(B)Heavy industry has caused so much pollution that the environment can benefit very little from the new products.
(C)Heavy industry has done so much harm to the environment that the budget for the ecologically friendly inventions has been reduced.
(D)Heavy industry is giving scientists a hard time since they cannot translate technological progress into environmental gains.