Words similar to pollution-free

Example sentences for: pollution-free

How can you use “pollution-free” in a sentence? Here are some example sentences to help you improve your vocabulary:

News Quiz will resume in a special pollution-free Friday edition.
Those seeking pollution-free swimming (see page 132) usually head for Guincho, but the famous old resort of Estoril itself, some 24 km (15 miles) from Lisbon, is still worth a visit.
A USAT front-page story reports that Honda has developed a virtually pollution-free gasoline engine that will be as powerful as conventional ones, and yet not more expensive.