 የአሜሪካ ኩባንያዎች በየዓመቱ ከሚሊዮኖች ፓውንድ ቆሻሻን ያባክናሉ ፣ ከተባከነ ወረቀት እስከ ተበላሹ መሣሪያዎች።
Each year the U.S. foundry industry generates several million tons of waste sand that is no longer useful to produce metalcasting molds.