Scientists disagree with you. Land cannot produce more than a certain level of food, oceanic farms are possible but have issues concerned with ecology and access in tidal waters, and increasing populations mean more land devoted to urban development. As much as you're optimistic, that's a rather ill-informed idea, and if you doubt it, please consult whichever science magazine you prefer. Sooner or later the issues will be described along with calls for changes in human feeding habits and concepts to fill the bellies of those who aren't going to be rich enough to afford the food they want according to common lifestyle expectation we take for granted. At the end of the day, I'm not the one issuing warnings - it's people better qualified than me who are writing these articles.