environmental - Google News
Environmental monitoring Four hundred parts per million - The Economist
 Examiner.com | Environmental monitoring Four hundred parts per million The Economist Useful environmental measurements are made all over the world. But too few are made consistently across the decades; data are taken over a funding cycle, or the life of a satellite, and then not again. And when charting the course of a changing planet ... Carbon dioxide levels are at a 3000000 year high World greenhouse gas levels hit milestone Greenhouse gas level highest in 2 million years |
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