With global population explosion to hit 10 bln by 2050 if there is enough land to grow a food?
Land need constant supply of fertilizer to be productive, most of which is later washed with rivers to the sea.
Shouldn't we be looking seriously to develop mass aquaculture?
Search for new genetically engineered seaweed rich in proteins , algae and fish farms at new tremendous scale? Crops that grow on or under the water.
On out planet we have much more watery are then dry surface. We also can extract and removed fertilizer and sediments escaped by rivers to the oceans directly by harvesting plants.
Running floating tractor and harvester must be also cheaper then on dry land.
Mega fish and mussel farms will come later.
Then floating estate for aqua workers and aqua farmers. No flooding insurance needed for your floating home. City on the sea.
Floating wind turbines to supply energy.
http://www.nzherald.co.nz/world/news/article.cfm?c_id=2&objectid=10707790
