1.The first key factor to solve this problem…Another key factor is…

　　2.People have found many solution/approaches to dealing with this problem.

　　3.Then how should we solve this problem? Here are some suggestion which may be some of help.

　　4.Faced with…we should take a series of effective measures to cope with the situation.

　　5.It is high time… Here are a few examples that might be taken immediately.

　　6.We need it take a fresh/dear/look at this matter/situation in a new perspective/from a winder standpoint. Otherwise, we won’t come anywhere near solving it.

　　7.It is essential/indispensable/that proper action/effective measures should be taken to reverse this situation/trend.

　　8.No effective/simple solution can be at hand/tackle the problem of… But the general first step in the right direction.