Food and Agriculture Organisation (United Nations) is an intergovernmental organization with 194 member states. The organisation's main objective is to achieve the food security for all. They have a report titled "How to feed the world in 2050"

Have a look:

http://www.fao.org/fileadmin/templates/wsfs/docs/expert_paper/How_to_Feed_the_World_in_2050.pdf

Regards

Let us think how China and India work on this issue. They have huge inhabitants, do they suffer hunger?

of course not, the science really help to provide the necessary techniques and instructions for making food available for all.

It's an interesting question anyway.

I think the universe will rearrange itself to feed the inhabitants