In the case of Great Barrier Reef green turtles, rising temperatures
have been linked to changing sex-determination, with an increasing
number of new hatchlings born female.

Humans are driving migratory animals-sea turtles, chimpanzees, lions,
and penguins, among dozens of other species-towards extinction,
according to the most comprehensive assessment of migratory species
ever carried out.

The State of the World's Migratory Species, a first of its kind report
compiled by conservation scientists under the auspices of the UN
Environment Programme's World Conservation Monitoring Centre, found
population decline, a precursor to extinction, in nearly half of the
roughly 1,200 species listed under the Convention on Migratory Species
(CMS), a 1979 treaty aimed at conserving species that move across
international borders.

The report's findings dovetail with those of another authoritative UN
assessment, the 2019 Global Assessment Report on Biodiversity and
Ecosystem Services, that found around 1 million of Earth's 8 million
species are at risk of extinction due to human activity. Since the
1970s, global biodiversity, the variation of life on Earth, has
declined by a whopping 70 percent.
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