問題にする

The structure X + を問題にする can be used to express the meaning "to bring up X as an issue" or "to question X." In its passive form, with される replacing する, the meaning becomes "X is brought up as an issue." なる can also be used there and have a meaning similar to the passive form.

環境問題においては、まず、どうすればゴミを減らすことが出来るかという点を問題にすべきだ。
As for issues with the environment, firstly we should address the point of how we can decrease the amount of trash.

地球の未来を考えた時、何よりもまず初めに地球温暖化が問題にされるべきだ。
When considering the future of the earth, first, more than anything, the issue of global warming should be addressed.

今、その国で一番問題にされていることは、子供達に平等に教育の機会を与えることだ。
Right now, the biggest problem to be addressed in this country is providing all children with the opportunity for an equal education.

最近、子供達によるケータイの使いすぎが問題になっている。
Recently, according to children, the overuse of cell phones is becoming an issue.