To capitalize on the earth-friendly factor, architect Robert Maschke suggested the Brahlers use an insulating eco-roof as well as a green exterior wall covered with layers of soil.

FORBES: 8 Homes With Living Roofs

From its solar-paneled roof to delicious organic fare, the restaurant is all about being eco-friendly.

CNN: Sample a Swedish seafood smorgasbord

By converting a five-storey "tong lau" -- an old Chinese building -- with solar panels, a turfed roof and energy efficient appliances, Khan also is keen to emphasize that his eco-friendly flat is as much about preserving the old and a sense of heritage as it is about being green.

CNN: Can Hong Kong build bigger, higher, greener?