What is the difference between linear and non-linear accident models?

Classify Each Pollutant Based On The Category That Best Describes Its Impact On Waterways. Categories: Toxic Chemicals Pathogens And…

Classify each pollutant based on the category that best describes its impact on waterways. Categories: Toxic chemicals Pathogens and waterborne diseases Thermal pollution Nutrient pollution Sediment Pollutants: Acid drainage from an abandoned coal mine Herbicide from a soccer field Medical waste from a hospital dumped in an illegal location Frigid water from the bottom of a reservoir Phosphorus-rich fertilizer from an agricultural land Nitrogen-rich grass clippings from a mowed lawn Clay soil from land cleared for home construction Eroded topsoil from agricultural land

What is the difference between linear and non-linear accident models? Why are non-linear accident models not used more often in workplace accident investigations?