Land scarcity is a concern as the world marched towards 2050 where the 9 billionth baby is expected to be born somewhere on the earth. Expanding population but dwindling land is not exactly a nice scenario to be in.
Considering earth surface is 70% water, saved for some immediate coastal inhabitants, the surface of the sea is largely left as it was. Which is by no way a bad thing, however, the world may not be able to afford to do so unless we are willing to sacrifice more of the precious green lung.
Given the technology innovation and the capability of today top notch scientists, perhaps it is high time the modern agriculture sector looks into sea surface farming. We are probably the best generation to do so, taking into the consideration of the technical knowledge, availability of investment capital and the environment awareness sensitivity.
While I think we should explore this option but I am also aware of the damage can be done to the ocean and all the marine creatures if the plan is not executed with full care. The coordinated planning and successful execution of the International Space Station (ISS) tell me the world is capable of putting aside all their differences when it comes to human advancement. The engagement of the best minds in the world to draw up a coordinated plan collectively is vital.
At the most elementary level, a greenhouse environment equipped with the best equipment can be constructed on purpose-built barges or decommissioned ships. If the Palm Jumeirah of the United Arab Emirates can be constructed so beautifully for largely leisure purposes, I am sure the world can find a way to construct leading-edge sea surface farming facilities for the benefit of the world population to obtain alternate food source.