asanace

Etymology
From.

Noun

 * 1) Modification or removal of buildings or whole city blocks, mainly for reasons of public hygiene
 * 2) Environmental remediation measures
 * 1) Environmental remediation measures

Usage notes
In the first sense, the word is mostly used in connection with the renovation of the Prague Jewish Quarter.

Akce Asanace was the cover name of a Czechoslovak secret police operation in the late 1970s and early 1980s the goal of which was the expulsion of leading dissidents out of the country.