Okay let me make it real simple for you. Here is a definition of wasteful.
> (of a person, action, or process) using or expending something of value carelessly, extravagantly, or to no purpose.
So yes. It is extravagant to use a straw and then throw it out and it is wasteful especially when perfectly viable alternatives are available that do not produce plastic debris.
> (of a person, action, or process) using or expending something of value carelessly, extravagantly, or to no purpose.
So yes. It is extravagant to use a straw and then throw it out and it is wasteful especially when perfectly viable alternatives are available that do not produce plastic debris.