granny4hugs
Many of the protestors are young - but many are not. Many young people do have their heads in the sand, consume resources at an alarming rate, throw plastic and other rubbish everywhere, can't be bothered to recycle, wear cheap clothes once then throw them away, fly off on holidays.
It isn't all what you term The Comfy Smug Generation doing all this - many of them are working to resolve the problems we face, conscientiously recycling their rubbish, wearing clothes for years, not constantly buying new fashion, growing their own food, planting trees for their grandchildren etc.
Please do not generalise, it is not at all helpful.