Green Roof Photo Contest is sponsoring a Green Roof photo contest on its Facebook page.

The “Love the Earth, Plant a Roof!” Earth Day Photo Contest is a great way to create interest in green roofs.

To enter, submit a photo and tell your friends and colleagues to vote for you on the Facebook page,

According to the contest rules, each planted roof needs to visually epitomize its relationship to our planet -- it needs to show us how it is a living example of loving the Earth.

The contest is open to everyone, not just the roof owner or the designers of record.

And voting is open to everyone, too, as many times as you like, but only once per day, so tell your friends to vote for your submission!

Last year's inaugural contest included 30 entries and over 1,500 votes.

Deadline to enter is 11:59 p.m. Eastern time, April 29. The winner will be selected on April 30.