More threats to the human race: declining sperm counts and a weakening gulf stream.
New York Times columnist Nicholas Kristof last Sunday sounded the alarm about epidemiologist Shanna H. Swan's findings that human sperm is disappearing.
That's just part of reproductive system disruptions caused by chemicals found in common household products and other environmental factors, Swan says.
Swan, a professor at the Icahn School of Medicine at Mount Sinai in New York, "warns that the impending fertility crisis poses a global threat comparable to that of the climate crisis," the Guardian said in an article Friday.
In a new book Swan co-authored, "Count Down: How Our Modern World Is Threatening Sperm Counts, Altering Male and Female Reproductive Development, and Imperiling the Future of the Human Race," she says “The current state of reproductive affairs can’t continue much longer without threatening human survival.”
Swan in a 2017 report released her disturbing findings that sperm counts in western countries had fallen by 59 percent between 1973 and 2011.
By 2045, the median sperm count could reach zero, she said in media reports, not elaborating how that could happen unless some males have a negative sperm count.
The plunging sperm count is just one reason for declining fertility rates.
Economic difficulties, changing gender roles and fears about the planet's future are also causing women to have fewer children.
If the reproductive apocalypse is not enough to worry about, the Atlantic Ocean's circulation system that underlies the gulf stream is at its weakest in a millennium, according to media reports.
The Atlantic Meridional Overturning Circulation system moderates temperatures. The system's collapse because of warming ocean temperatures could exacerbate climate change's extreme weather and the flooding of coastal cities, according to media reports.
From moments of human intimacy to oceanic systems, the world's intricately connected. One part depends upon the other. The carbon-based economy threatens patterns of life that developed over millennia.