New research suggests that moderate increases in temperature and nitrogen from atmospheric pollution may actually improve forest productivity. Researchers have been monitoring the temperature, moisture and nitrogen deposited by acid rain at four forest sites in the northern US since 1987. They have found that the trees grow faster at higher temperatures and store more carbon with increasing concentrations of nitrogen, providing there is sufficient moisture.

Download Printable PDFs that appeal to 3 different reading levels and should be applicable from grades 4-12. Print one, two, or all three versions to appeal to the diverse reading abilities in your classroom:

Download Printable PDFs that appeal to 3 different reading levels and should be applicable from grades 4-12. Print one, two, or all three versions to appeal to the diverse reading abilities in your classroom:

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