Which environmental problem is linked to increased levels of chlorofluorocarbons (CFCs)?

Increased levels of chlorofluorocarbons (CFCs) are primarily linked to decreased ozone levels in the stratosphere. CFCs are man-made compounds that, when released into the atmosphere, eventually rise to the stratosphere where they are broken down by ultraviolet (UV) radiation. This process releases chlorine atoms, which can catalyze the destruction of ozone (O3) molecules.

As the ozone layer becomes depleted, its ability to absorb harmful UV radiation diminishes, leading to increased exposure to UV rays at the Earth's surface. This heightened exposure can result in increased health risks, such as skin cancer, cataracts, and other health problems related to UV radiation.

While health risks from UV radiation are a concern, the direct link of CFCs to ozone depletion is central to why this answer is significant. The connection is crucial since addressing CFC emissions can lead to the recovery of the ozone layer, ultimately reducing the associated health risks.