Teenagers are not too young to teach other people about anything.I believe teenagers know many things.I think teenagers learn technology and environment and they teach others foreign languages.
firstly,teenagers must teach technology because we know computer,we have phones and we learn a lot of thinks.For examples teenagers know how to use very good apps and learn hew people.
secondly,teenagers can teach people about the enviroment because we know a lot about the pollution and the clean beaches.For example teenagers know how organise, recycling, bottles and glasses.This means that garbage will not exist any more.
Thirdly,teenagers can teach people foreigh languages.For example teenagers learn to speak many languages and get to know other people.In this way people know how to speak better.
In conclusion I believe teenagers can learn other people techonology,languages and enviroment.Overall if adults leave teenagers do their things,they would make this world a better place