What are vapor recovery systems designed to do?

Vapor recovery systems are specifically designed to capture and contain fuel vapors emitted during the process of transferring fuel, such as during refueling of vehicles or storage tank filling. This is crucial for reducing emissions of volatile organic compounds (VOCs) which can contribute to air pollution and have harmful effects on health and the environment. By diverting these vapors back into the fuel system, vapor recovery systems help ensure that the released emissions are minimized, promoting cleaner air quality and compliance with environmental regulations.

The other options relate to different aspects of fuel management but do not address the primary function of vapor recovery systems. Storing excess fuel safely pertains to safety standards in fuel storage but is not the focus of vapor recovery technology. Enhancing burning efficiency of fuel relates to combustion processes rather than vapor collection. Monitoring fuel quantities is essential for inventory management but does not involve vapor recovery functions. Thus, the correct choice clearly identifies the main purpose of vapor recovery systems in the context of environmental protection and compliance.