Straight River
...that a decline of the population of brook trout in the Straight River in central Minnesota was caused by rising water temperatures, prompting government scrutiny of nearby irrigation operations?
...that a decline of the population of <a href="./Brook_trout" id="mwAuI" rel="mw:WikiLink" title="Brook trout">brook trout</a> in the <b id="mwAuM"><a href="./Straight_River_(central_Minnesota)" id="mwAuQ" rel="mw:WikiLink" title="Straight River (central Minnesota)">Straight River</a></b> in central <a href="./Minnesota" id="mwAuU" rel="mw:WikiLink" title="Minnesota">Minnesota</a> was caused by rising water temperatures, prompting government scrutiny of nearby <a href="./Irrigation" id="mwAuY" rel="mw:WikiLink" title="Irrigation">irrigation</a> operations?