In March of this year, France passed a national green law stating that new commercial buildings must have renewable energy in some form, either solar panels or green roofs. This is the first law on a national level, although cities such as Toronto, Copenhagen, Tokyo, and Zurich have created similar laws.
One reason for this policy is the reduction of the amount of energy being used to heat and cool a building in the extreme seasons like summer and winter. Secondly, they retain rainwater, reducing issues with runoff, and favoring biodiversity.
The law was made manageable for businesses by requiring the roof be covered only partially with plants. Owners were also given the option to use solar panels instead.
Think the US will follow? Let us know your thoughts!
Photo Credit to ecosalon.com