Wasting money buying phones every year just to be trendy is awful. I think we should learn how to save the money we get from different sources because we are teenagers so we don't earn that money. It's hard not to go with trends as a teenager because if you don't go with them you'll be considered boring. The new generations should be taught how to manage money and how to be liked for their character, not for the things they have on them or what kind of phones they have.
The prices of brand new products are very high, that's why teenagers think that if you have one product that is very expensive they are cool and should stay around them. Even if it's not necessary to buy all those expensive things, people will buy them for approval from others.

Also many of these products consume many resources of the earth

I completely agree with all your words. Teenagers are wasting so much money on trending things like some types of clothes or some technology. We teenergers don't even earn that money but we are wasting our parents hours of works. Also, so much money is spent on the production of all these really unnecessary things, at the same time polluting the environment, and that money can be used for something much more necessary.

I agree, I think our society became to material these days, not only do teenager spend too much money on things that are not necessary in life, but they also don't realize how much work is needed to make one piece of clothing. The fact is that most of the clothes industries have big factories in countries that uses people which need money to feed their families and doesn't assure they are paid enough for their hard work. Also, the carbon pollution those big industries are causing is terrible. So as solution I would say that we need to buy more clothes in second hand shops or at least reduce the number of pieces of new clothing we are buying in a year.