Alibaba sells greenhouses for as little as 70 cents per square meter. The bulk, high volume cost to the manufacturer is about 50 cents per square meter. If installation labor costs are 50% of the 2 million hectare project then it would cost about $20 billion for the 2 million hectare project. $40 billion would be sufficient for China to make 40 billion square meters of climate-controlled greenhouses which could produce all vegetables and crops. It would cost $260 billion to make greenhouses for the food production of the entire world. China has 103 million hectares of arable land. China will use an area that is 2% of its farmland to provide half of the crops, vegetables and fruit for 1.4 billion people. Six times this is enough for half of the food needs for everyone on earth. Indoor climate-controlled agriculture has almost no need for pesticides and uses 7% of the water. This would take up 3-5% of the total land area of open-air farming.