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“The connection needs to be made between the climate emergency and all-glass buildings. “Certainly, I think there should be a ban,” he added. Sadiq Khan, the mayor of London, has ruled out such a plan for the British capital, but Sturgis believes the American is on the right lines. In April the mayor of New York, Bill de Blasio, said he would ban all-glass buildings and force developers to retrofit existing buildings to make them more energy-efficient, although the “ban” was later clarified to mean excessive use of glass and steel.
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Air conditioning is a growing proportion of this: energy used on cooling has doubled since 2000 and accounts for about 14% of all energy use now. The International Energy Agency estimates that about 40% of global carbon dioxide emissions come from constructing, heating, cooling and demolishing buildings. To avoid this greenhouse effect, air conditioning has been the standard solution. But the sunlight also brings heat, and in sealed buildings there is nowhere for it to escape to naturally – something which, as Britain sweltered in a record-breaking heatwave last week, will have become apparent to many working inside them. Glass-fronted offices, from high- profile buildings like the Shard to shopping centres and industrial parks, have become popular with architects and their clients because they create an arresting view in a city skyline, let in lots of natural light and provide great views for those inside. “If you’re using standard glass facades you need a lot of energy to cool them down, and using a lot of energy equates to a lot of carbon emissions.” “If you’re building a greenhouse in a climate emergency, it’s a pretty odd thing to do to say the least,” said Simon Sturgis, an adviser to the government and the Greater London Authority, as well as chairman of the Royal Institute of British Architects sustainability group. Leading architects and engineers are calling for all-glass skyscrapers to be banned because they are too difficult and expensive to cool.