There are several environmentally-friendly ways to dispose of an old washer and dryer:

1. Recycling: Many recycling centers accept large appliances and will ensure that the materials are processed responsibly.
2. Donation: If your washer and dryer are still in working condition, consider donating them to local charities, shelters, or organizations like Habitat for Humanity.
3. Retailer Take-Back Programs: Some retailers offer take-back programs when you purchase a new appliance. They will take your old washer and dryer and recycle them properly.
4. Bulk Waste Collection: Check if your local waste management service offers bulk waste collection days specifically for large appliances.