Based on German prototypes, green walls and roofs are a natural idea in Singapore's tropical environment, where mosses, ferns, philodendrons, orchids and other epiphytes literally grow on trees. — Alan Huffman Copy Share Image
As people flock to urban centers where ground space is limited, cities with green walls and roofs and skyscraper farms offer improved health and well-being, renewable resources, reliable food supply, and relief to the environment. — Diane Ackerman Copy Share Image
