Well, of course there’s a limited amount of oil in the world so we’ll run out of it at some point, but the estimates are always based on reserves, and reserves change based on the price. If we start “running out” the price will go up and more oil will be available to extract at those prices, so we’ll have more reserves and more years of it. The amount of oil we are burning has been quite stable for the last few years in about 100 million barrels per day, not a lot changed because of the war (you need a massive amount of gasoline to keep the billions of cars in the world running).
In any case, if we keep burning oil up to the point where we start running out of it, the world would already be in a much terrible situation, that’s why we need to start now and with the right justification (we need to stop burning fossil fuels, no matter how much of them there is).
Really? You are asking for IRB approval just to fill a random survey on Google forms? You are definitely being too difficult.