Over the past century, the concentration of greenhouse gases in the atmosphere has ______This has led to______heat being held in the troposphere, where infrared radiation is ____likely to encounter a greenhouse gas molecule and be
absorbed. This has led to an increase in global temperatures, also known as global warming. As a result, we are seeing changes in weather patterns, sea level rise, and the loss of biodiversity, among other impacts.
Over the past century, the concentration of greenhouse gases in the atmosphere has increased. This increase in greenhouse gases, such as carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O), has led to more heat being held in the troposphere, which is the lowest layer of Earth's atmosphere. Infrared radiation, which is emitted by the Earth's surface and would otherwise escape into space, is more likely to encounter a greenhouse gas molecule and be absorbed and re-emitted back towards the Earth's surface. This process is known as the greenhouse effect.
