casual
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Due some math dude, Beijing has population of 21.6million. An average lot size for a villa is 600 square meters. Let's say the average family size is 3 people and only the top 30% of the population own villas. This comes out to 822 square km. This is just for the lots themselves. With roads, markets, schools and other supporting public infrastructure, it would come to around 1600 square km. Totally unsustainable for China.The red line of 1.24 million square kilometers of cultivated land is too high. We don't need to keep so much arable land.
Now our grain output is 217% of that of India. India has the same population, and they can even export food.
And we are entering a population decline cycle, and the demand for food will become less and less.
I think we can just keep 700000 square kilometers of arable land, and then seriously crack down on food waste. Export tax will be levied on non-staple food export enterprises.