first draft introduction

Many people use a lot of products in daily life. For example, you use some cosmetics for your dating. And If you catch a cold because you stay at home and turn on an air conditioner, you have medicine that doctor prescribed. Also, you have a meal when you are hungry. Most people use products without doubt because they believe that products are safe. So, What kind of process do these products go through in order to ensure these products are safe? They are tested through animal testing! Many companies experiment on animals to make safe products. But, use of animal in experiments cause controversy. There are some people who argue that animal testing is most effective and accurate method to develop medicine. On the other hands, there are some people who argue that we should not use animals on experiments because animal testing has cruelty and unreliable method. In such controversy, It seems like facts that we should not experiment on animal.