document.writeln ('Beetle Infestation May Impact Climate Change
A pine beetle infestation ravaging a Canadian forest may have an impact on the earth\'s ability to process carbon dioxide and exacerbate climate change, a new study shows.
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document.writeln ('Democrats Face Continued Battle After Clinton\'s Pa. Victory
Facing another must-win battle, Hillary Clinton won the Pennsylvania Democratic primary, but it\'s unclear how much the victory will help close her delegate deficit against Barack Obama.
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document.writeln ('More Lesson Plans from NewsHour Extra
Are you searching for ways to make your subject matter more relevant and engaging while building your students\' analytical thinking and critical analysis skills? Select a lesson plan from NewsHour Extra\'s Teacher Resources page.
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