Related Clues:

• Be ecological
• Conserve
• Find another application for
• Male relative
• Employ anew
• Part of an environmental mantra
• Ecologist's exhortation
• Get more mileage out of
• Don't throw away
• Find a new purpose for
• Apply again
• Be ecological with
• Don't just toss away
• Put back into service
• Get extra value from