Things will change, they have to. The problem is it will take time and having some 16yo screaming "how dare you" and demanding action now is not helping. Has nobody noticed that most governments are pushing renewable energy production and reductions in emissions, do people not realise that the information Greta is imparting has come from the IPCC which was set up by the UN.
Our lives/world is set up to use fossil fuels and has been since man lit the first fire, this is going to take a while to change.
Think of the poor African children in the cobalt mines gathering material for batteries next time you drive your electric car