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A giant panda cub at a conservation and research center in the Sichuan Province of China in 2019. Photo: An Yuan/China News Service/Visual China Group via Getty Images

Wildlife populations have plummeted 68% in less than half a century and the "catastrophic" decline shows no sign of slowing down, a major conservation report published Wednesday warns.

Driving the news: The World Wildlife Fund for Nature (WWF) "Living Planet Report 2020" that monitored 4,392 species of mammals, birds, fish, reptiles and amphibians from 1970 to 2016 points to one underlying cause for the populations decline and deterioration of nature: humanity.

What they found: Deforestation undertaken to increase agricultural land space was the biggest contributor to the decline, according to the biennial, which was in collaboration with the Zoological Society of London.

  • Three quarters of all freshwater and a third of all land mass is dedicated to food production, the report notes.
  • Populations in Latin America and the Caribbean have seen the biggest fall, with an average decline of 94%. Global freshwater species have fallen 84%.
  • "Nowhere in the ocean is entirely unaffected by humans," notes the report, with overfishing and pollution exacerbated by climate change cited as major problems.

Of note: The findings concur with those of a 2019 United Nations report that warns 1 million animal and plant species are under threat from extinction — driven by changes in land and sea use; "direct exploitation of organisms," such as hunting, fishing and logging; climate change; pollution; and invasive species.

What they're saying: WWF-U.S. President and CEO Carter Roberts said in a statement, "As humanity’s footprint expands into once-wild places, we're devastating species populations. But we're also exacerbating climate change and increasing the risk of zoonotic diseases like COVID-19."

Between the lines: The spillover of pathogens from animals to humans — driven mainly by human behaviors like urbanization and the demand to eat meat — is increasing, Axios' Eileen Drage O'Reilly notes.

  • These Zoonotic diseases have "quadrupled in the last 50 years, mostly in tropical regions," a letter sent to Congress in March from more than 100 wildlife and environmental groups stated.

The bottom line: A study published in the journal Nature Thursday and co-authored by over 40 nonprofits and academics finds cutting food waste and opting for more nutritional diets would help prevent further losses to the ecosystem.

  • The WWF report also notes that the environmental crisis can be mitigated by such considerations and if world leaders take urgent action on consumption industries, including ending deforestation.

Read the full "Living Planet Report 2020," via DocumentCloud:

Go deeper: Coronavirus is tied to climate and biodiversity crises

Go deeper

Amy Harder, author of Generate
Jun 1, 2020 - Energy & Environment
Column / Harder Line

Your guide to comparing climate change and coronavirus

Illustration: Eniola Odetunde/Axios

Climate change and the coronavirus have a lot more in common than the letter C, but their differences explain society’s divergent responses to each.

Why it matters: The Internet is full of comparisons, some from biased perspectives. I'm going to try to cut through the noise to help discerning readers looking for objective information.

1 hour ago - Health

Florida records most new daily COVID cases in state since pandemic began

Nurses bring a portable x-ray machine to a treatment tent outside the emergency department at Holmes Regional Medical Center in Melbourne, Florida, set up to serve as an overflow area as the number of COVID-19 infections surges throughout Brevard County. Photo: Paul Hennessy/SOPA Images/LightRocket via Getty Images

Florida reported 21,683 new COVID-19 cases — the most in the state in a single day since the pandemic began, per data released by the Centers for Disease Control and Prevention on Saturday.

The big picture: Florida is now the U.S. coronavirus epicenter, with the Delta variant driving a surge, Axios Tampa Bay's Ben Montgomery notes.

Updated 4 hours ago - Health

Chart: Less than 0.1% of vaccinated Americans tested positive for COVID-19

Expand chart
Data: CDC and state Covid dashboards. Dani Alberti/Axios

Of the 164 million vaccinated Americans, around 125,000 people have tested positive for breakthrough infections and 0.001% have died, according to state data compiled from state dashboards by NBC and data from the Centers for Disease Control and Prevention.

Why it matters: While "breakthrough cases" have been getting media attention, the low numbers show that the pandemic is mostly a threat for the unvaccinated population.