The question is whether some cities have overdone it, meaning the boom will end sooner than expected as second and third tier cities look to fill in vacancies at residential and commercial developments before they mix more concrete to build more.

FORBES: Barclays Warns On China

Concrete, says John Miller, a North Dakota commercial beekeeper, is the last crop.

CNN: What's killing the bees

She said commercial waste had increased significantly, including bags of rubble and concrete, but that bags of personal household rubbish were also a common sight.

BBC: Imerys land

The four-storey concrete and glass Imax was built 15 years ago, but was not a commercial success.

BBC: Bournemouth Imax cinema demolition begins

You saw really in direct, concrete terms yesterday the kinds of opportunities that are going to exist in Asia with the announcement of the commercial transactions that the President announced yesterday.

WHITEHOUSE: Press Briefing