From the New York Times, a statistical reminder of progress to date and how far yet to go:

Over the past 25 years, the number of conservation areas set aside for the nonhuman species has grown considerably. Globally, there are now more than 100,000 protected areas, including national parks, biological reserves and marine sanctuaries. All told, they protect slightly less than 13 percent of the land on earth and slightly more than a half-percent of the oceans, though only a minute fraction are “no-take” zones that bar fishing. But can these protected areas do enough to protect biological diversity?