When faced with structural injustice, especially in the form of oppressive military occupations, I have a tendency get a little worked up. So I was interested in learning more about the complicated conflict and decided I would lend some of my time and energy to do so.
Until the 1990s, there were few reliable observations about movement at the scale of the entire universe, which is the only scale dark energy effects. So dark energy could not be seen until we could measure things very, very far away.
So if somebody wants to build a coal-powered plant, they can; it's just that it will bankrupt them because they're going to be charged a huge sum for all that greenhouse gas that's being emitted.