I don't believe local products necessarily have a smaller environmental footprint than less local products. At least there are examples to the contrary here in northern Europe where some food crops can be grown locally in greenhouses, but because of the heating required, it would create a smaller environmental footprint if the crops were grown on open land in Spain or Morocco, and then transported here on trucks.
Land that isn't suitable for food production for humans can be used for other purposes that are also important. For example, growing hemp for making clothes, or growing trees for wood products, and protected areas for wild animals.
Land that isn't suitable for food production for humans can be used for other purposes that are also important. For example, growing hemp for making clothes, or growing trees for wood products, and protected areas for wild animals.