A worker is dwarfed by the structure of 'Supertrees' in Singapore on June 29, 2011. These 'Supertrees' are vertical gardens, embedded with environmentally sustainable functions.
PHOTO: Wong Maye-E/AP
A worker is dwarfed by the structure of 'Supertrees' in Singapore on June 29, 2011. These 'Supertrees' are vertical gardens, embedded with environmentally sustainable functions.
PHOTO: Wong Maye-E/AP
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