1. Why are some fats healthy and some are unhealthy?

Monounsaturated fats and polyunsaturated fats are known as a good fats because they are good for your heart your cholesterol and your overall health. The in these fats can help to lower the risk of heart disease and stroke and lower bad LDL cholesterol levels well increasing good HDL. Some bad fats are bad because they can drive up your cholesterol and tip the balance towards being more harmful, and can end up increasing your body weight and body mass

Look how black i am peep the profile pic

"air pollution" is the correct answer i believe