When couples separate, they need more rooms, more electricity and more water, which increases their greenhouse gas emissions, he said.

他说，夫妇离异后，需要更多房间，消耗更多电和水，这会加大温室气体排放。

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These include an "under occupancy" penalty - dubbed a "bedroom tax" by critics - for social housing tenants in properties judged to have more rooms than they need.

BBC: Supply of council housing