Carbon dioxide is the most abundant greenhouse gas, but the levels of other planet-warming gases like methane are also rising. NOAA tracks many of them. Earlier this year, NOAA announced that the Annual Greenhouse Gas Index -- a measure of greenhouse gas emissions and their impact on the the atmosphere's heat-trapping capacity -- rose to a value of 1.
How society deals with that will be a major challenge in coming decades. The agency also announced that CO2 levels increased at a record rate in , echoing the findings of other studies that showed carbon emissions increased around the world after a few years of minimal growth. Science News. But Asia immediately sprang to mind. Another leading climatologist, Ralph Keeling, whose father, Charles D. He explained that warming itself releases carbon dioxide from the ocean and soil.
Political controversy The Intergovernmental Panel on Climate Change projects that, if unchecked, atmospheric carbon dioxide concentrations by will range from to parts per million. As a result, the panel estimates, average global temperature would probably rise by 2. The Kyoto Protocol would oblige ratifying countries to reduce carbon dioxide emissions according to set schedules, to minimize potential global warming. The pact has not taken effect, however.
Use these resources in your classroom to help your students understand and take action on climate change. Today, greenhouse gasses in the Earth's atmosphere are at their highest since the Pliocene Era, when sea levels were higher and the Earth was warmer. We live at the bottom of an invisible ocean called the atmosphere, a layer of gases surrounding our planet. Nitrogen and oxygen account for 99 percent of the gases in dry air, with argon, carbon dioxide, helium, neon, and other gases making up minute portions.
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