Art made from trash. Sounds a little gross, but it's not completely unheard of. Most of the time, it's actually pretty cool. WebUrbanist spotlighted five of the most innovative artists, all of whom create their work from cardboard.

The pieces are unique, expressive, and certainly "outside the (cardboard) box," but re-using materials such as corrugated cardboard also makes it environmentally friendly.

We want to know what you think, so have a look at these five unusual yet revolutionary artists.

1. Alex Uribe

Inspired by nature, Alex Uribe creates sculptures exclusively from recycled, corrugated cardboard, both in large and small scale. Featured here are Uribe’s figurative, organic shapes, exploring abstract ideas rather than realism. Just as interesting are Uribe’s exposition of the female form as seen in Koura, Lucia, and Jodi.

2. Sylvie Reno

Forty Kalashnikovs in 15 days, by hand, would be a daunting task for most people. She is not afraid, or angry, or bitter, for Sylvie Reno it’s just another day in her studio. She does, however, find relief in her compulsion and obsession with installations consisting mostly of repetitive work. Dozens of Kalashnikovs, a handful of automatic pistols, and more knives than Dexter will ever need, she says she has no imagination, we think she’s not being entirely honest.

3. Mark Langan

Looking at the beautifully complex pieces above, we would never have guessed that Langan’s exposure to corrugated cardboard art was purely accidental. Tearing apart some old cardboard boxes, Langan saw the beautifully corrugated innards of the boxes and thought to himself, “…if I were to slice, stack, and glue pieces to each other, some very interesting effects could be created.” With over 15 finished works (and counting) and the seemingly impossible intricacy of his work, there is no wonder he is one of the most popular and well-respected artists of his type.

4. Dag Weiger

Unlike many of the other artists and sculptors listed here, Dag Weiser doesn’t work exclusively with cardboard. He has works in oil painting on canvas, pastel, ink, bronze, and recycled art from found objects. Weiser’s fascination with cardboard is a relatively recent one. Since he started working with cardboard, however, he has worked on extensive installations and elaborate props and sets. Above is a 1983 installation for a neighborhood Halloween trick-or-treat celebration.

5. Chris Gilmour

In contrast to Alex Uribe’s abstract, nature-inspired, organic sculptures, Gilmour’s work is more geometric and usually consists of popular manufactured goods recognizable by the average person. It is also notable that Gilmour uses colored cardboard or paints the final piece to complete the transformation from a piece of cardboard to a finished product.

Which cardboard artist is your favorite?

via WebUrbanist