We humans are overfishing our oceans. It's gotten to such a point that, in only a few years, we will essentially have fished the ocean extinct.
There are many species of fish, still commonly eaten, that are endangered. A plethora of species are simply destroying fisheries and your health.
The U.K. is currently considering a ban of the sale of blue fin tuna because of extreme overfishing. Check out the NY Times Blog for further information about what to buy and what not to.
Also, we should start thinking about the Native American proverb: “The world is not inherited from our ancestors, but borrowed from our children!” Because it is our generation that is destroying the food system for our children. Let's become aware of ongoing issues, change our lives a little, and fix the problems for our children.