Why are many experiments carried out under the ventilation hood?

Many experiments are conducted under a ventilation hood to ensure the safety of laboratory personnel by minimizing exposure to hazardous fumes, vapors, and particulate matter. The hood helps contain and exhaust these harmful substances, reducing the risk of inhalation and contamination. Additionally, it provides a controlled environment that can protect sensitive reactions from external air currents and environmental factors. Overall, using a ventilation hood is a critical safety measure in laboratory settings.