Up for a green challenge for the fall? Try entering one of these three contests, both for simple eco-fun and for a chance to win green prizes:

4030460260 26d7f5d7cb m >> Create a costume for the Inhabitat Green Halloween Contest! Just submit a photo of your “one-of-a-kind, green-themed, DIY costume” into Inhabitat’s Green Halloween Costume Photo Contest for a chance to win a solar-powered Bogo flashlight, a $100 gift certificate to the Inhabitatshop or other Inhabitat goods!

Need ideas to get you started? We’ve got tips on creating your own green Halloween costumes — and one for your dog while you’re at it!

>> Submit a fair trade recipe and win a basket of fair trade goodies! Alter Eco’s putting together a Fair Trade Community Cookbook — and wants your help! The top 10 rated recipes will win their creators- an Alter Eco gift basket. Even if you don’t have a recipe to submit, you can still browse Alter Eco’s submissions to pick out a recipe for your next socio-conscious meal.

>> Win an eco-reality-show-meets-social-media contest for internet fame. Make a short video to enter The EarthCare Challenge for a chance to be picked as one of six contestants who’ll compete via a 45-day Green Makeover! The contestants’ greening efforts will be put on Facebook, Twitter, Flickr, and EarthCareInside.com — where anyone can follow the contestants’ progress and vote for the winner. The grand prize winner gets furnishings from Hickory Springs.

Image courtesy of Inhabitat

Green contests for green rewards
Whether you're a great cook or a social media maven, these contests will test your talents on an eco-challenge.