Concentrations of what in the air have increased over the last 10 years dramatically
chlorofluorocarbons fossil fuels ozone Greenhouse gases Greenhouse gasses oxygen carbon dioxide air molecules
A B C D E F G H
Decades have 10 years.
Carbon dioxide concentrations in the air have increased over the last 10 years dramatically
Concentrations of what in the air have increased over the last 10 years dramatically (A) chlorofluorocarbons (B) fossil fuels (C) ozone (D) Greenhouse gases (E) Greenhouse gasses (F) oxygen (G) carbon dioxide (H) air molecules