香蕉视频

A Montreal company is eagerly awaiting a crop of tomatoes, cucumbers and herbs grown in a vast greenhouse perched on top of an office building, and billed as the world's first rooftop garden farm.

"Our vision is a city of rooftop farms," says the Lufa Farms website of the gardens nestled above the Canadian metropolis, as it mourns the loss of good farm land due to commercial development and urban sprawl.