They help us recycle.  We also use a water filter versus bottled water.

we recycle together

My teenager has for several years collected her empty water bottles and soda cans in garbage bags. We take them to the recycling center. She does the same with old newspapers, school work, other papers. Be sure to rinse out the soda cans. She continues to do this now that she's in college.

Use cloth napkins and cleaning rags, then wash them for re-use.

Use vinegar and/or baking soda for most cleaning projects.

Run the dishwasher only when it's full. If it's going to be a couple of days before you have a full load, run only the cold water rinse cycle, or rinse the dishes thoroughly before puttng them in the dishwasher.

Take advantage of your community's pickup projects for used motor oil, old appliances, batteries, paint and other potentially dangerous items.

Ask your pharmacist for the proper way to dispose of old medications. Flushing them down the toilet or kitchen drain puts them in the water supply.