Environmental protection is an eternal topic. Pollution and tree reduction are all important factors of environmental damage. Coowin chose wpc this material in 2000 because of environmental concerns. Wood plastic composite(WPC) cladding is an environmentally friendly material that can be recycled and has a 3-5 times longer life than wood. It feels that there are six major environmental protection features. No heavy metal, no toxic gas emissions, no production waste. Recyclable, high lifespan, wood alternatives.