Final answer:
Transporting hazardous materials that react dangerously when in contact with each other can lead to fires, explosions, and release of harmful gases.
Step-by-step explanation:
When hazardous materials that react dangerously when in contact with each other are transported together, it can lead to various hazardous situations. For example, if a corrosive substance comes into contact with a flammable substance, it can cause a fire or explosion.
Similarly, if a toxic substance comes into contact with a reactive substance, it can release harmful gases or cause chemical reactions that are dangerous.