Five to Follow on Twitter for UpcyclingLooptWorks founder Scott Hamlin reveals his list of top tweeters for upcycling.

Scott Hamlin doesn't believe in waste.

To prove it, in 2009, Hamlin co-founded the Portland, Ore.-basedLooptworks, an online-apparel company that makes limited-edition jackets, hoodies, skirts, shirts and graphic tees. But here's the twist: All of Looptworks' products are made from (gasp!) "upcycled," or excess manufacturing fabric and materials.

Hamlin (@Looptworks) uses social media to boost the awareness and tout the benefits of upcycle, or "closed loop" manufacturing. He hopes more people will think about what they buy, where it comes from and what natural resources are required to produce it.

Here are his top five Twitter streams to follow for the latest upcycling news, tips and information:

1. @TerraCycle
   Followers:9,328
   Tweets:2,360
   Trenton, N.J.-based TerraCycle's purpose is to eliminate the idea of waste entirely. The company, which was founded in 2001 byTom Szaky, turns hard-to-recycle waste like potato-chip bags and computer equipment into new-again products. More than 20 million people currently collect waste in 11 countries for the company to upcycle. The Twitter stream is full of industry trends and links to upcycled goods.
   Sample Tweet:Check out great upcycling contest by @methoodtweet and @dwell http://bit.ly/jeucy9
2. @billmcdonough
   Followers:5,534
   Tweets:297
   Through his book Cradle to Cradle: Remaking the Way We Make Things, William McDonough brought the term "upcycling" to the mainstream. McDonough is also the founding principal ofWilliam McDonough + Partners, an architecture and community design firm in Charlottesville, Va., that focuses on ecologically-, socially- and economically-minded architecture and planning. He primarily tweets news about eco-friendly companies and closed-loop manufacturing.
   Sample Tweet:What a pleasure to spend time with the savvy team at @Methood today in SF-- they are Cradle to Cradle believers, focused on "more good"
3. @wornagainUK
   Followers:596
   Tweets:59
   Since 2005, Cyndi Rhoades' London upcycling companyWorn Againhas made designer products from corporate waste materials. The company's motto? "Some things are just too good to go to waste." Worn Again's Twitter feed offers tips and news about new technologies and emerging trends within the closed-loop movement.
   Sample Tweet:"A stepping stone to closed-loop" - Upcycled @EurostarUK bags from uniforms by @wornagainuk: http://bit.ly/ksvT7I
4. @etsy
   Followers:1,402,498
   Tweets:12,026
   "Etsy is the original hub and community for upcycling artists," Hamlin says. Since 2005, the Brooklyn, N.Y.-based mega, online mall for all things crafty, handmade and vintage has become something of a mecca for refurbished goods as well. The company's Twitter stream consists of tips and advice for both buyers and sellers on the site, as well as green biz and upcycling news.
   Sample Tweet:Upcycling a revolution. http://etsy.me/lOZs5w via @shareabledesign
5. Reuse Alliance
   Followers:1,082
   Tweets:716
   MaryEllen Etienne is the co-founder and executive director ofReuse Alliance, a New York-based non-profit that promotes the benefits of reusing waste. The organization aims to educate the public about the social, environmental and economic benefits of reusing goods. Etienne tweets the latest green business news and loads of interesting upcycled products.
   Sample Tweet:You Can Hang Ten on Artist Rich Morrison's Upcycled Beer Can Surfboard: http://bit.ly/mUnjkH via @Inhabitat #reuse #fb

Who do you follow to stay on top of Upcycling?Let us know in the comments section.