so fun fact, i live within walking distance of that dc project (close enough that i was invited to attend a presentation by edc on what it would do to the immediate area) and i've done the math on the grid load. the hydro plants in the city currently meets about 40% of its needs. edc wants 750MW of reserve power generation (that's diesel) installed on the site. if we assume that's double their average usage, they will still more than double the energy needs of the city. and that's in the middle of an infrastructure crisis that means we're stuck buying german coal.
ecosia has always felt kinda skeevy to me, because tree planting isn't actually carbon positive. it becomes positive after 40 or so years, granted that the trees are not cut down. which is usually what happens. also, just like ddg, ecosia is dependent on bing, the search provider with the worst carbon footprint, to function.
and i probably don't need to tell you what cobalt mining does to the environment or the people who handle it.
so it does help to look deeper at the things in your daily life :)