PROBLEM - SOLUTION COLLOCATIONS

source:  Longman on-line

Problem have a problem big/serious/major problem cause a problem deal with/sort out a problem solve/fix/overcome a problem address/tackle a problem pose/present a problem a problem arises/occurs/comes up (=it happens) economic/financial problems	Issue subject/problem [countable] a subject or problem that is often discussed or argued about, especially a social or political matter that affects the interests of a lot of people the issue of something raise an issue (=say that an issue should be discussed) address an issue (=discuss or deal with an issue) resolve an issue avoid/dodge/duck/evade an issue (=avoid discussing an issue) confuse/cloud an issue (=make an issue more difficult by talking about things not related to it) important/key/major/big issue thorny/vexed issue (=difficult issue) complex issue sensitive issue political/social/economic/environmental issues something is not the issue spoken (=used to say that something is not the important part of what you are discussing) Abortion is a highly controversial issue. We should raise the issue of discrimination with the council. Dillon addressed the issue of child abuse in his speech. How the issue is resolved is crucial. When asked about the bill, the senator tried to duck the issue. They're clouding the issue with uninformed judgements. The key issue is whether workers should be classified as 'employees'. the thorny issue of creating a single European currency Economic issues should get more attention. Unemployment is not the issue - the real problem is the decline in public morality.
Crisis economic/financial/political crisis deal with/handle a crisis energy/oil/housing crisis debt/budget crisis a crisis erupts/arises a major/severe crisis resolve/solve/defuse a crisis avert a crisis in/during a crisis be in crisis crisis management (=dealing with a crisis)
Threat The fighting is a major threat to stability in the region. present/pose a threat (to somebody/something) Pollution poses a threat to fish.
Concern  (worry) [uncountable] a feeling of worry about something important: The recent rise in crime is a matter of considerable public concern. concern for our concern for human rights concern about/over/with the rise of concern about the environment the growing concern over inflation concern with worsening law and order concern that increased concern that the war could continue for a long time be a cause for concern/cause concern