Sludge
1. Sludge | a) the solids that are left after sludge is burned at an incinerator |
2. sewage treatment plant | b) chemicals that help plants to grow |
3. ash | c) a place where wastewater is cleaned up |
4. septic system | d) a way of treating wastewater in areas where there is no sewage treatment plant |
5. incinerator | e) water that goes down the drain |
6. toxic | f) the solid part that is left over when wastewater is treated at a sewage treatment plant |
7. landfill | g) a place where sludge can be burned |
8. nutrients | h) able to injure human health |
9. wastewater | i) a place where garbage is buried in the ground |