is crude oil toxic
There are four types of crude oil: Class A: Light, Volatile Oils: These oils are highly fluid and highly toxic to humans, and include jet fuel and gasoline. Class B: Non-Sticky Oils: These oils are waxy and less toxic to humans, and include diesel fuel and light crude oil. Class C: Heavy, Sticky Oils: These oils are brown or black and sticky or tarry, and include most crude oils. Their toxicity is low, but if spilled, their impacts on waterfowl and wildlife can be severe.