Could anybody help me, please? I'm having trouble solving this CAE exercise:
"The amounts of household waste produced anually are on the increase. As a result, discarding / disposing / dumping of such large amounts is becoming a serious problem."
I've always thought "discarding", "disposing" and "dumping" were sinonyms in this case. To my surprise, the answer key of this exercise gives "disposing" as the correct answer. I have checked a collocations dictionary, regular English-English dictionaries and looked for the difference between these words, but I still have no idea.
Does anybody know why "disposing" is the correct answer?
Thanks in advance.