This is the most shocking, infuriating, and meaningful conclusion I have maybe ever seen:
The new Living Planet Index report from the World Wildlife Fund opens with a jaw-dropping statistic: we’ve killed roughly half of the world’s non-human vertebrate animal population since 1970.
The WWF data show that the species declines vary by habitat and geographic area. Tropical areas saw greater declines, while temperate regions – like North America – saw lesser drops. Habitat-wise, land and saltwater species saw declines of roughly 39 percent. But freshwater animals – frogs, fish, salamanders and the like – saw a considerably sharper 76 percent drop. Habitat fragmentation and pollution (think algae blooms) were the main killers of freshwater species.
The declines are almost exclusively caused by humans’ ever-increasing footprint on planet earth. “Humanity currently needs the regenerative capacity of 1.5 Earths to provide the ecological goods and services we use each year,” according to the report. The only reason we’re able to run above max capacity – for now – is that we’re stripping away resources faster than we can replenish them.
This is a model, so I don’t know how much faith to have in the specific percentage. But it is the clear and obvious trend, and its implications for life on the planet, that should slap us in the face, wake us up, and get us thinking about how to entirely re-invent human culture, human lifestyles, and the global economy.
The way in which the ever-expanding human presence on the planet is devastating the natural world and the biodiversity that we should be nurturing (instead of destroying) should be the number one preoccupation of humanity. It should be treated with greater alarm than Ebola, Al Qaeda, ISIL, and the Kardashians.
Put the arcane and petty religious disputes aside. Put the shortsighted and endless warring aside. Put intolerance, self-interest, and callous disregard aside. Put rampant self-gratification aside. And focus on the fact that we can’t think the way we think, and live the way we live. Everything must be questioned. Everything must be changed.
The Earthist Chronicles 
As my botany professor said back in the 1970’s: “In the coming years, next to human overpopulation, every other problem we will face will be trivial by comparison.” JD
Tim, why do you advocate against zoos and aquariums? Do you honestly believe that things are going to get better? 7.2 billion humans on Earth with all of our garage and oil spills, radiation, by catch. Where are the animals supposed to live? What will the planet be like when there is 8 billion, 9 billion, 10 billion humans? Where will the animals live? African elephants have reached a tipping point, more are killed by poachers than are being born. The Yangzte River dolphin is extinct, there are only 50 Maui’s Dolphins left. The list goes on.
I do not have absolute feelings about zoos and aquariums. I am against for-profit zoos and aquariums for sure. And worry that the idea that zoos and aquariums can somehow preserve or substitute for animals in the wild will only hasten the demise of animals in the wild. And a part of me wants to say that if we are so short-sighted and self-interested as to destroy the environments the animals need to survive in the wild we don’t really deserve to be able to enjoy them in zoos and aquaria. Plus, I do not believe that our pleasure at seeing an animal on display in captivity should outweigh any suffering that animal experiences by being in captivity. So, you are correct, I am not really a fan of zoos and aquaria.
But there is one context in which I can support the work of zoos and aquaria: and that is in the preservation of the genetics that would allow us to reintroduce or repopulate an extinct or threatened species if we ever did change enough about the way we treat the planet to restore the environment they need to thrive in the wild. That sort of Noah’s Ark strategy, as much as I hate that it has come to that, is hard to dismiss. But for me to accept that as a sufficient rationale for zoos and aquaria, the captivity and display model would have to change dramatically to better serve the interests of the animals, and serve less the interests and desire of curious humans seeking amusement.