No doubt, much of the earth's surface is uncultivated and that the sea contains immeasurable riches. But it is an absurd extreme of technological optimism to expect great increases in food production to occur through the placing of more land under cultivation. Since man breeds so recklessly fast, they could ultimately crowd each other out of every available space. Suffice it to say that they are bound to reach that point where want and hunger multiply like themselves and then, at last, the needs of all these multitudes would drive mankind into madness. Confronted with an overflowing sink, one doesn't have to be a genius to choose whether to reach for a mop or the faucet.
Time is dangerously over-ripe as far as the population control problem is concerned.
There are too many people and too little food. Jesus Christ, Himself, had to feed the multitude before He could preach the Beatitude. We cannot forever continue to multiply and subdue the earth without losing our standard of life and the natural beauty that is part of it. We have to show concern for God's other creatures, too, you know. I submit that they, too, have the right to life.