But when you consider that the majority of land is uninhabitable for humans (Sahara is 9 million sq/km, Antarctica is 14 million sq/km, large portions of Siberia and the Arctic), that logic is stupid.
Furthermore, the CIA World Factbook states that roughly 11% of the Earth's total land mass is arable land.
Check and mate. Lock this thread.
He uses 12.5% in stead of 11% and then shows that only 0.8% (10,277 / 1,241,166) could be destroyed.
Using your 11% its:
148,940,00 * 11% = 16,383,400
16,383,400 / 14,9 = 1,099,557
10,277 / 1,099,557 = 0.9%
Wow! 0.1% increase!