I have had Prii since 2001 (back when it was a sedan). Had good experience with them until recently: 2011 prius with 110K miles had to have it's engine replaced. Decided to do that instead of getting another car because anecdata tells me this was an aberration.
Overfishing of sardines happen because most of it is ground up and used as feed in aquaculture (which is very inefficient). Instead, if you consume sardines directly, it will be a more sustainable enterprise.