The ash could be toxic and must be tested. There are an estimated 162 incinerators in the United States. While the garbage pile grows, people are discovering new ways to use trash and reduce the waste. Many companies continue to invent ways to recycle paper, glass, metal, etc. so that these can be used over and over. Recycling waste has become a business for companies, too.
Recycling reduces pollution by decreasing the amount of trash that is burned or buried.
It helps slow down the rapid consumption of natural resources, too.