Tuesday, May 7, 2019
Climate Change To Blame For Lower Birth Rate In US And EUROPE
Arctic methane release is the release of methane from seas and soils in permafrost regions of the Arctic. While a long-term natural process, it is exacerbated by global warming. This results in a positive feedback effect, as methane is itself a powerful greenhouse gas.current warming (just one degree Celisus) has already left a discernible mark on 77 of 94 different ecological processes, including species’ genetics, seasonal responses, overall distribution, and even morphology – i.e. physical traits including body size and shape. About 47 percent of land mammals and 23 percent of birds have already suffered negative impacts form climate change. In all, nearly 700 species in just these two groups are flagging under climate change, according to this research.If global society doesn’t kick its fossil fuel addiction – and quick – scientists estimate that temperatures could rise 4-5 degrees Celsius by the end of the century. Such a rise would be not so much catastrophic, but apocalyptic.Scientists are working frantically to give melanin to white and non-melanated Asian populations or else they will cease to exist by 2100.The master enzyme in all this is tyrosinase. If the gene for this enzyme is defective, the result is a person with albinism, someone who makes no melanin at all. But the most remarkable discovery made by molecular biologists has been that most of us, regardless of skin color, have quite enough tyrosinase in our melanocytes to make us very black. In those of us without eumelanin (brown/black) who are pheomelanin dominant (white), something is preventing the enzyme from functioning at full capacity--and that seems to be a combination of two genetic mechanisms: a switch that causes the cell to make most of the tyrosinase in an inactive form, and a tendency to make a lot of inhibitors of the enzyme. In the body, the effects of either or both of these mechanisms can be modified by such environmental factors as exposure to ultraviolet light. People with albinism are highly sensitive to ultraviolet, which can easily damage skin and eyes,make one prone to many pre-natal diseases,premature aging,myopia and infertility.In animals, melanin comes and goes at the dictates of evolutionary pressures. It is reasonable to assume, then, that we humans have this molecule not because it makes us smarter but primarily because it helps us survive a variety of environmental conditions. Clearly melanin protects us from the ravages of ultraviolet light. Some of the most darkly pigmented people in the world, natives of the North Solomon Islands, almost never get basal cell carcinoma or melanoma, and if they do have melanomas, these tumors arise on the light-skinned soles of their feet. Caucasians in South Africa,Australia,The middle East,India, and South America have high rates of skin cancer which are doubling every year caucasians living in Hawaii, have the highest documented skin cancer rate in the United States. ALL European nations are below replacement levels for indigenous populations yet the word remains silent about this citing economies as the culprit while African nations with worse economies are seeing the highest number of births in decades!Many believe this is the underlying cause for the rise in white supremacist rhetoric and fascism globally.Climate adaptation is surprisingly rarely reported as a cause for the build‐up of reproductive isolation between diverging populations. Fast temperature‐dependent co‐evolution between mitochondrial and nuclear genomes may be particularly likely to lead to hybrid sterility...This may already be apparent as studies show that men from European populations globally have lost 60 percent of their ability to bear children since 1973!Data from nearly 43000 men around the world found that sperm counts dropped by more than half in Western countries.Men even have their own version of a biological clock. Beginning around their mid-30's, male fertility gradually degrades, and while most men produce sperm to their dying day, those past 40 who help conceive have a greater risk of passing on genetic abnormalities to their children, including autism. Globally the oldest male populations are white and Asian adding a double whammy to the situation four decades ago, the average "Western" (European) man had a sperm concentration of 99 million per milliliter. By 2011, that had fallen to 47.1 million and continues to drop by 1.5 percent each year!The researchers found no significant declines for non-Western men, though other studies have found major drops in countries like China and Japan(non-eumelanated Asian populations).Women need to average roughly 2.1 children—enough to replace themselves and their partner, with a spare bit to offset kids who don’t survive to reproductive age—to keep a country’s population stable through birth alone. The U.S. is at 1.8 and dependent on continued immigration to keep the white population growing ironically the anti immigration sentiments currently in the US are speeding up demographic decline and destabilizing the economy. Low sperm counts may also presage a premature death, even among men in the prime of their lives who might seem otherwise healthy.
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