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Half of plant species endangered
The estimate, published in this month's Nature, is much higher than those of earlier studies that don't include plants in tropical areas such as Ecuador and Colombia. The study blamed global warming and human encroachment for wiping out 310,000-422,000 plants worldwide, up to 47% of all species.
Green energy sources fall short
U.S. government scientist called for a major research investment into new energy sources, saying current alternatives such as wind, solar and nuclear ...