Ten percent of the big fish still remain. There are still some blue whales. There are still some krill in Antarctica. There are a few oysters in Chesapeake Bay. Half the coral reefs are still in pretty good shape a jeweled belt around the middle of the planet. There's still time but not a lot to turn things around.
The golden opportunity you are seeking is in yourself. It is not in your environment it is not in luck or chance or the help of others it is in yourself alone.