Although the picture above is very real, with booming technology and economy, who knows what we might be able to do in the future. We could make a crop that grows underwater imagine that, being able to use a crop like that can prevent starvation across the world (even though it is difficult to farm such a crop). Even living on or underwater can ease the stress of overcrowding on land, even if we find alternate energy sources underwater can help the human race survive into the future.