I disagree with the statement that all natural chemicals are not harmful and all synthetic chemicals are highly dangerous. Here are three reasons why: 1) Many natural chemicals can be harmful in large quantities, such as arsenic or snake venom. 2) Not all synthetic chemicals are inherently dangerous. Many are designed to improve quality of life, like medicines or food additives. 3) Whether a chemical is natural or synthetic does not determine if it is safe - its chemical properties and how it interacts with the body determine if it is harmful or not. Some natural chemicals can be toxic in small amounts while synthetic chemicals can be safely used.