Recycling as a technology 4,000 years old . More than 500 million tons of material recycled every year . As a boom industry in the world . BIR says producing paper from recycled paper as opposed to wood can slash air pollution by as much as 74 percent and water pollution by 35 percent ; while manufacturing recycled steel results in 86 percent less air pollution . Health risks arising from poor recycling practices in China .
Recycling as a technology 4,000 years old . More than 500 million tons of material recycled every year . As a boom industry in the world . Health risks arising from poor recycling practices in China .