I saw this picture of one of my favorite humans, Hank Green, floating around and felt like I had to add these basic examples. Yes, there are extremely harmful chemicals/molecules out there, but you can't be afraid of all chemicals because literally everything is made of chemicals - from the air to your full body. Your body functions because it makes chemicals and reacts with other chemicals. Your senses are results of chemical reactions. Your emotions are chemicals, your food and nutrition are chemicals, your whole life is chemicals. Whether it's a solid, liquid, or a gas. Chemicals. There's a big reason why you have to take a lot of chemistry when you study biology... Life IS chemistry.