Developers have broken ground on what they claim will be the UK's first carbon-negative residential building project.
High levels of insulation, ground source heat pumps and microgeneration wind turbines on the roof are among the green features that will be included in the Greenhouse in Leeds.
Developer Citu is to build 172 homes, office space and amenities at the site, which will also have solar thermal water heating and an offsite wind turbine.
Its various renewable energy technologies will allow the development to generate surplus electricity.
A spokesman said: "The combined technologies mean that greenhouse uses less energy than it creates, which allows the excess to be fed into the National Grid. This makes the development carbon negative."
Following the introduction of the Energy Act, the development will earn above market rates, known as feed-in tariffs, per unit of electricity it supplies to the national grid.
It will also contribute toward meeting national target of generating 15 per cent of energy from renewable sources.
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