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Fossil pollen records show rainforests actually thrived during past, ancient warming periods.
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Tumors that have plagued worldwide for decades may be caused by, a new study says. |

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| As continuing eruptions of Mount Merapi in central Java threaten thousands of Indonesians and impose on the diplomatic mission of President Obama, their immediate impact on humans seems pretty clear. Less obvious are the impacts of volcanoes in the long-term on other features of our lives such as weather and climate. |
In a surprise finding, undersea hot lava is baking ocean sediments and releasing greenhouse gases. |