Partially agree with you that it is difficult to do! People like you were talking about electric cars like Tesla! It is not possible for a car to be charged from an outlet and our ecology will only get better! And what is happening now? Flights into space are not only Musk but also others ....... yes, it wakes up for a very long time, but still it goes .....Taxes are paid for many things. Some tax money in some countries might actually go to preventing flooding if ocean levels rise. They even have a ludicrous carbon credit scheme in some places that might be used for such things.
If you are in an area where water levels rise so you cannot live there, you will indeed have to "run away" to somewhere else if there is no easy way to mitigate that rise.
Going to a demonstration will accomplish nothing other than waste everyone's time. Sceaming and yelling and stamping your feet isn't going to change anything. The world needs more energy and green power isn't going to be the way it gets most of it. Electric vehicles are far too expensive for the vast majority of people to own.
There simply is not enough will power nor the ability to replace sufficient energy needed in a world that demands more energy all of the time. Nothing is going to replace those coal and oil powered generators. In truth more of them will have to be built just like they did recently in the DR. That is why it is best just to move elsewhere if you see threats caused from climate change.