But all the fanfare associated with the value of biodiversity, the excitement of discovering new species, expanding or at least maintaining parklands, greenbelts, and critical biological corridors has in a matter of a few days once again been tainted by doubts and no small terror.

FORBES: The Best and Worst of Times: Killer Vegetables, Plunging Markets, Infinite Nature

If successful, the firm believes this type of system could form part of a new approach to sustainable farming, making use of urban greenbelts while helping to reduce the carbon footprint associated with food production -- which accounts for up to 30% of total emissions worldwide, according to a 2008 Greenpeace report.

CNN: Farm in the city could be supermarket of the future