Learn English: Can Dirty Air Make Your Brain Sick? (easy)

Scientists are trying to figure out if bad air can make you forget things, like when you're older.

They're looking at tiny bits of dirt in the air that can get into your nose and even your brain.

They want to find out how these tiny bits can make your brain get confused and maybe even make you get Alzheimer's disease.

If they figure it out, maybe they can make medicine to help people's brains stay healthy.