The BBJ’s William Hall reports that, yes, climate change has led to some insurers not renewing home-insurance policies with customers on Cape Cod. But seven of the state’s top 10 ZIP codes with the most insurance non-renewals are actually in central and western Mass., far from rising sea-level threats. What gives? It’s a little bit of a mystery, but perhaps it’s tied to smaller, locally based insurers pulling back coverage. Hall explains.