Final answer:
Poisonous substances should never be transported in a vehicle, as they can cause harm or even death. It is important to handle and store such substances according to instructions to prevent health hazards.
Step-by-step explanation:
Poisonous substances should never be transported in a vehicle because they can pose a serious risk to the driver, passengers, and others on the road. These substances can potentially cause harm or even death if they come into contact with humans or the environment. It is crucial to follow proper handling and transportation protocols to ensure the safety of everyone involved.
In terms of health hazards, poisonous substances can have a range of effects, from short-term illness to severe consequences like brain damage, coma, or death. It is therefore essential to handle and store such substances according to the instructions provided on their labels. This includes keeping them out of reach of children and using proper safety measures to prevent accidents or exposure.