What is a crucial safety rule regarding exhaust fumes?

Proper ventilation in the work area is essential to ensure that any harmful exhaust fumes from engines or heavy machinery can dissipate safely. When exhaust is not adequately ventilated, it can lead to the buildup of toxic gases, such as carbon monoxide, which can pose serious health risks to workers. Proper ventilation helps maintain air quality and reduces the likelihood of inhaling harmful substances.

While it might seem intuitive to block exhaust or consider it insignificant at low levels, the reality is that even minor exhaust could accumulate in enclosed spaces, resulting in dangerous concentrations over time. It's vital to maintain an environment where fresh air can circulate and carry away any potential hazards, which is why ensuring proper ventilation is a crucial safety measure in any operation involving combustion engines or machinery.