Define precautionary principle.

If the evidence, even if not fully studied, shows that human health or the environment cannot be harmed, then all precautionary measures should be taken to avoid or reduce the potential harm.

If the evidence, even if not fully studied, shows that human health or the environment can be harmed, then no precautionary measures need to be taken to avoid or reduce the potential harm.

If the evidence, even if not fully studied, shows that human health or the environment cannot be harmed, then no precautionary measures need to be taken to avoid or reduce the potential harm.

If the evidence, even if not fully studied, shows that human health or the environment can be harmed, then all precautionary measures should be taken to avoid or reduce the potential harm.

The precautionary principle is a guiding principle in decision-making that advocates taking precautionary measures even in the absence of full scientific certainty. It suggests that if there are potential risks of harm to human health or the environment, preventative action should be taken to avoid or minimize those risks, even if the evidence is not yet fully studied or conclusive. This principle emphasizes the importance of considering potential negative impacts and prioritizing prevention over waiting for irrefutable evidence of harm before taking action.