Caution! The site can't guarantee, that text has age permission. The site is not recommended, if you are less than 18 years old.
The site shows example sentences for English words. How the word or phrase could be used in a sentence?
" ... Birds collected later during World War II were sootier due to a sharp increase in manufacturing and concomitant coal use, but after that war ended, bird specimens became cleaner because local residents began heating their homes with natural gas instead of coal. ... "