The 5 star reviews are I suspect, largely fake.
Sadly, Greta is being used as a puppet for the Globalist Elite to further an agenda that is actually NOT about saving the planet at all - It's about power and control in the hands of the few.
Doing even a small bit of research makes this pretty clear and I'd say you have to be pretty oblivious and uneducated to believe that the WEF, WHO, Bill and Melinda Gates Foundation and any of these Globalist Organisations care about us in any way and want what's best for us.
It's encouraging to see so many reviewers rejecting this nonsense, recognising it for what it is and standing up for the truth.