What does the Environmental Protection Agency focus on?

The Environmental Protection Agency (EPA) focuses on maintaining environmental standards, which encompasses a wide range of responsibilities aimed at protecting human health and the environment. This includes regulating pollutants in air and water, managing waste, and ensuring compliance with environmental laws. The EPA's efforts are crucial in addressing issues such as climate change, hazardous waste management, and biodiversity conservation, all of which play a significant role in ensuring a sustainable environment for current and future generations.

In contrast, the other options do not align with the primary mission of the EPA. Military operations and security focus on national defense, communication regulations pertain to the telecommunications industry, and customs enforcement is related to trade and border control. Each of these areas involves different government agencies and regulatory frameworks, highlighting the distinct role the EPA plays in environmental protection.