How can you cut your carbon footprint by half? It might seem impossible, but take a short ferry ride from the centre of Stockholm and you may just find the answer. The district of target='_blank'>Hammarby Sjostad, a former brownfield site on the edge of a lake, is fast becoming a model for sustainable 21st century living.
Over the past few years the area has been redeveloped to provide environmentally friendly, ecologically sustainable residential housing for around 25,000 people. The overall goal is that the impact on the environment caused by emissions from Hammarby Sjostad should be 50% lower than the corresponding level for newly constructed housing districts in other parts of the city.

The authorities imposed tough environmental requirements from the outset of the project, focussing on areas as diverse as land usage, energy, water and sewage, waste, transportation and building materials. The complex uses large underground tanks to store household waste, which is collected twice a week for sorting and recycling. The organic waste from the complex, including the sewage, is turned into biogas and waste that cannot be recycled is burnt to provide central heating. The development is expected to be finished in 2015, and is already being followed closely by municipal leaders from across the world.
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