Quote:
The scientists calculated that the "point of no
return" will arrive when concentrations of atmospheric
carbon dioxide reach 400 parts per million (ppm). For
most of the 20th century, these carbon concentrations
increased by about 1 ppm per year. In recent decades,
that rate rose to 1.5. Today it's more than 2 ppm per
year. Grand total: 379 ppm, and counting. It's a level
of atmospheric carbon this planet has not experienced
for 420,000 years.
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This is what's scary.....