I want to know the answer

Across
A non-degradable waste
Toxic wastes from industries
Household wastewater

Dear student
Your question seems to be incomplete. Kindly send the crossword puzzle. 
However I have answered by giving general examples:
1. A non degradable waste -  aluminium cans, plastic
2. Toxic waste from industries -  paints, batteries, pesticides. 
3. Household waste water - detergent water, sludge. 

Hope to hear you soon. 
Regards