It is clear that implementing a strong retention strategy is key to addressing this churn.
Saudi Arabia may also be part of the key to addressing the morass in Pakistan.
As is the case with any relationship, communication is the key to addressing this problem.
"The key to addressing the H.I.V. problem is what government does not want to do," he said.
Establishing well-connected, business, investor and knowledge hubs akin to Silicon Valley is key to addressing this.
And it is the key to addressing many of the greatest challenges we face, such as climate change, energy generation, poverty and disease.
"A detailed plan for delivering fiscal consolidation remains the key to addressing concerns about the UK's public finances, and to supporting the macroeconomic recovery".
The key to addressing this is to recognise the conflict between the interests of consumers and investors and their interests as members of civil society.
The key to addressing that sort of pollution, Mr Esty argues, is not just money but good governance.A closer look at the rankings makes this relationship clearer.
In an interview with one of the few large Danish fashion brands, Jack and Jones, part of Bestseller Group, sustainability manager Dorte Rye Olsen explains that they believe that supply-chain transparency is key to addressing all the main issues.
Ed Miliband said the key to addressing public concerns about immigration was preventing companies abusing employment laws and ending the UK's "chronic dependency on low-skill, low-wage labour" from abroad.
