After the opening of the Sixth Seal, which we have argued will be manifested by a cataclysmic eruption of a supervolcano, the biggest global challenge will be food. Should the Long Valley caldera erupt, it would have a large negative impact on US grain production. Similarly, the opening of the Seventh Seal will also result in further global supply constraints on grain production.
However, if you live in Australia, then there is hope — kangaroos.
http://www.nydailynews.com/life-style/australia-kangaroo-population-rises-expert-eat-article-1.3487420
There are so many kangaroos in Australia, they are causing many problems. The Australian government is hoping to popularize kangaroo meat in hopes of turning their problem into cash (they should hire Chinese chefs to create delicious dishes).
Not only are there plenty of kangaroos to eat (very lean and organic meat), but there are also many feral animal species, whose extermination would save indigenous animals (mostly marsupials) which are being driven to the edge of extinction by these other invasive species. Feral camels, horses, and cattle roam the outback. Feral cats now can be found in 98% of the country and are the most at fault for the extinction of many marsupial species (there is an aboriginal tribe who regularly hunt feral cats for meat). When man can no longer grow grain due to global warming, then if you have hunting skills, go to Australia and hunt for your food (but mind the poisonous snakes and spiders!).
(If I offended cat lovers or anyone else, then just get over it.) 🙂