pollute
verb (used with object)
to make foul or unclean, especially with harmful chemical or waste products; dirty.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
I am in my study looking out on the snowy garden and the frosted trees, which are as yet fair and white, though in a few hours the breath of Manchester will have polluted them.
From The History of David Grieve by Mrs. Humphry Ward