A link between greenhouse gases and the evolution of C4 grasses

How a changing climate can affect ecosystems is an important and timely question, especially considering the recent global rise in greenhouse gases.

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<p><a href="http://www.physorg.com/news117386951.html">A link between greenhouse gases and the evolution of C4 grasses</a></p> <p>How a changing climate can affect ecosystems is an important and timely question, especially considering the recent global rise in greenhouse gases.</p>