
Victorian-era salon filled with houseplants. Photo Courtesy Library of Congress
By Kimberly Sevilla
Carbon dioxide, or CO2, levels are the highest they have been in MILLIONS of years. According to a recent article in the New York Times, “Heat-Trapping Gas Passes Milestone, Raising Fears” (May 10, 2013), the amount of the gas in the air is the highest it has been for at least three million years.