What is the primary means of warning forces about CBRN hazards?

The primary means of warning forces about CBRN hazards is indeed the CBRNWRS, or Chemical, Biological, Radiological, and Nuclear Warning and Reporting System. This system is specifically designed to detect and report CBRN threats and hazards in real-time, providing crucial information that enables commanders and troops to take appropriate protective measures. The CBRNWRS consists of automated systems and procedures that ensure timely and accurate dissemination of information regarding potential threats, which is vital for maintaining operational effectiveness and safety for military forces.

The other options, while relevant to the overall framework of managing CBRN threats and hazards, serve different purposes. CBRN Intelligence Reports provide analytical information about threats but do not function as a real-time alert system. A Hazardous Material Review focuses on identifying and assessing chemical hazards but is not primarily intended for immediate warning. An Operational Risk Assessment helps in evaluating potential risks and is essential for planning but does not directly offer real-time warnings about CBRN hazards. Therefore, the CBRNWRS is specifically tailored to provide immediate warnings, making it the most effective option.