完善後的句子应该是：
1 Currently,a hot button is the problem of excessive packaging across society,the prevalence of which has greatly impacted­­ the environment.
(必须用倒装句结构,因为of which距离excessive packaging 实在太远了.用is替换has become更能说明the problem的状态.)
2 Currently,the problem of excessive packaging has become a hot button across society,and its prevalence has a great side effect on the environment.
(用its替换the- - - of which会使句子更简单明确.has a great side effect on是英语natives在表达这种语境时常用的短语.用词的'to the point“是别人认为你英语ok的关键.)of which距离excessive packaging 实在太远了这个理由说的有点牵强Currently,the problem of excessive packaging has become a hot button across society,the prevalence of which has greatly impacted­­ the environment.如果是原句的话，of which就算指hot button ，我觉得也是通顺的。。你觉得呢a hot button 一般认为是“抽象的概念”，而这种概念本身是不会破坏the environment的。 朋友，不要有什麼想法，这里只是尽力而为。Just act on your preference.有道理！thanks