Okay, so you know what weeds are, right? They're those plants that grow in places where we don't want them to like in your backyard or in a garden. Well, some of these weeds are called noxious weeds.
Now, what makes them noxious is that they can harm the environment, animals, or even humans! They can grow really quickly and take over areas where other plants live. They can also spread really easily, which makes it hard for other plants to grow which can cause big problems.
Noxious weeds are kind of like bullies. They push other plants around and make it hard for them to live. And just like bullies, we need to stop them from causing harm. That's why people work hard to identify and remove noxious weeds, so that they don't cause any more harm to the environment or animals.