"Ecological devastation" refers to severe and extensive damage done to the natural environment, causing harm and destruction to various organisms, ecosystems, and their interactions. Full definition
He moved to protect many of these same regions from oil and gas development and the potential ecological devastation they bring. (earther.com)
Even the slightest possibility that such a virus could reach Australia would create a risk of such immense ecological devastation that the «solution» to invasive gum trees would be worse than the problem - and so, the approach wouldn't be worth contemplating. (canetoadsinoz.com)
En route, Jackson finds ecological devastation and the radio rants of conspiracy nut Charlie (Woody Harrelson), who warns of the impending 2012 disaster, much to Jackson's disbelief. (scifimoviepage.com)