I used the geolocation data of power plants around the world combined with the data for the production capacity for each plant. I used the geolocation to put them on the canvas, and then at each point a bar extends from the canvas vertically upward to account for the capacity of the plant.
I think something to make this more visually appealing would be to add some interactivity. I think it could be that as the user clicks on a point, they can get more information about that power plant, like the country, capacity, type of plant, etc. A pop-up text box could display such information.