Hawks, vultures and storks circle overhead as Christopher Sveen points at the heap of refuse rotting in the desert heat. "This is the mine of the future," he beams.

Sveen is chief operations officer at UBQ, an Israeli company that has patented a process to convert household trash from landfills into reusable plastic. After five years of development, the company is bringing its operations online, with hopes

of revolutionising waste management worldwide and making landfills obsolete. It remains to be seen, however, if the technology really works and is commercially viable.

UBQ operates a pilot plant and research facility at Kibbutz Zeelim, on the edge of southern Israel's Negev Desert, where it has developed its production line.

"We take something that is not only not useful, but that creates a lot of damage to our planet, and we're able to turn it into the things we use every day," said Albert Douer, a member of the company's board. He said the UBQ's material can be used as a substitute for conventional petrochemical plastics and wood, reducing oil consumption and deforestation.

UBQ has raised $30 million from private investors, including Douer, who is chief executive of Ajover Darnel Group, an international plastics conglomerate.

Leading scientists serve on its advisory board, including Nobel Prize chemist Roger Kornberg, Hebrew University biochemist Oded Shoseyov and Connie Hedegaard, a former European Commissioner for Climate Action.

The small Zeelim plant can process one ton of municipal waste per hour, a relatively small amount that would not meet the needs of even a midsize city. But UBQ says it is planning to expand operations.

On a recent day, Chief Executive Jack Bigio stood alongside bales of sorted trash hauled in from a local landfill.

He said recyclable items like glass, metals and minerals are extracted, and the remaining garbage - "banana peels, the chicken bones and the hamburger, the dirty plastics, the dirty cartons, the dirty papers" - is dried and milled into a powder.

The steely gray powder then enters a reaction chamber, where it is broken down and reconstituted as a plastic-like composite material. UBQ says its closely guarded patented process produces no carbon dioxide or toxic by-products, and uses little energy and no water.

According to the United Nations Environment Pro-gramme, five per cent of global greenhouse gas emissions are produced by decomposing organic material in landfills. Roughly half is methane, which is 21 times as potent for global warming as carbon dioxide, according to the World Bank.

For every ton of material produced, UBQ says it prevents between three and 30 tons of CO2 from being created by keeping waste out of landfills.

UBQ says its material can be used as an additive to conventional plastics. It says 10-15 per cent is enough to make a plastic carbon-neutral by offsetting the generation of methane and carbon dioxide in landfills. It can be molded into bricks, beams, planters, cans, and construction materials. Unlike most plastics, UBQ says its material doesn't degrade when it's recycled.

The company says converting waste into marketable products is profitable, and likely to succeed in the long run without government assistance.

"What we do is, we try to position ourselves at the end of the value chain, or at the end of the waste management hierarchy," Sveen said. "So rather than that waste going to a landfill or being incinerated, that's kind of our waste feedstock."

The wonder plastic isn't without its sceptics, however. Duane Priddy, chief executive of the Plastic Expert Group, said UBQ's claims were "too good to be true" and likened it to alchemy.

"Chemists have been trying to convert lead to gold for centuries, without success," Priddy, a former principal scientist at Dow Chemical, said in an email to The Associated Press. "Likewise, chemists have been trying to convert garbage to plastic for several decades."

Even if its technology is ultimately successful, UBQ faces questions about its long-term viability. Building additional plants could be expensive and time-consuming. It also needs to prove there is a market for its plastic products. The company said it is negotiating deals with major customers, but declined to identify them or say when the contracts would go into effect.

- AP