Lead and its Threat to Humans and the Environment Lead is a dangerous metal that damages humans and the environment. Frequent exposure to lead can lead to severe complications in humans and animals. This is a problem because lead was onced was in a vast amount of products used by humans and lead pollution created by industrial work. Lead exposure is a problem because of what lead does to humans, the environment, and the lead proliferation of it. Lead is a threat to humans because of its very negative health effects. For example, common symptoms of lead poisoning are pain, headaches, digestive problems, and mental problems. In addition to having short term effects on people, it can also cause long term complications. Examples of long
