WASHINGTON (AFP) – Two young American businessmen have developed a green alternative to ubiquitous polystyrene packaging – made from farm waste and mushrooms – that uses 10 times less energy to produce, and biodegrades into a natural fertilizer.

Called EcoCradle, the product can also be used as insulation and is grown, not manufactured, with no greenhouse gas emissions, such as CO2, as a byproduct, co-inventor Eben Bayer, 24, told AFP in an interview.

"We have developed a platform that we think is perfect for replacing the polystyrene that is used in packaging, because... it is biodegradable and it's created using almost no energy, almost no CO2 emissions," he added.

Bayer and Gavin McIntyre, classmates from the Rensselaer Polytechnic Institute in Troy, New York, founded Ecovative Design in 2007 to produce EcoCradle.

"For each unit of EcoCradle we produce, compared to the same unit or volume of polystyrene, we use ten times less energy and emit eight times less CO2 over the life of the product from production, use and to disposal," Ecovative Design CEO Bayer said.

"Our long-term vision is actually to replace all plastic and foams and mitigate their environmental consequences... and this natural platform we have discovered or invented will allow us to do that," he said.

EcoCradle is a patented trademark in the United States and 30 other countries, including the European Union members.

Currently polystyrene, a plastic, is so prevalent in the packaging industry it accounts for 30 percent of all the waste in US landfills, Bayer said.

EcoCradle, on the other hand, degrades naturally in contact with water or moisture and has "a positive impact on the environment... as a natural fertilizer for plants."

The new product is made from agricultural byproducts including cottonseed hulls, buckwheat hulls and rice husk that are mixed with a filamentous fungi – mycelium – as a bonding agent, and allowed to grow inside molds.

The mycelium secretes a powerful enzyme that decomposes the organic waste as it grows. After seven days at room temperature in the dark, a compact, ultra-light, malleable material is formed that can resist temperatures of up to 800 degrees Celsius (1,472 Fahrenheit), Bayer said.