Final answer:
The United States has taken measures to address ozone depletion through global cooperation and international agreements, such as the Montreal Protocol. Restricting the production and use of ozone-depleting chemicals like CFCs has been a key focus. Despite ongoing challenges, these efforts have resulted in improvements and provide hope for the restoration of the ozone layer.
Step-by-step explanation:
Ozone depletion is a significant environmental issue that has been addressed in the United States through global cooperation and international agreements. One of the key agreements is the Montreal Protocol, which was ratified by nations all over the world. This protocol controls the production and emission of chemicals that damage the ozone layer, such as chlorofluorocarbons (CFCs). As a result, CFCs have been mostly phased out since 1995. The United States has also implemented restrictions on pollutants to slow down ozone depletion. While the ozone depletion problem is not completely solved, these efforts have led to improvements and offer hope for the restoration of the ozone layer.