The question requires more definition.
the food
That depends on where you grow it and where, specify please.
No it is not harmful because food is biodigratable and when it aborbs in to the soil in makes plants grow. It is good for our earth not bad for it.
16 stalks
They live on it. They build houses, grow food etc......
they grow so much food because Japan has great weather for their crops and Japan has speacial tequniques to make sure the crops grow perfectly.
no land to grow crops
Bamboo can grow pretty much every where on earth except polar regions.
However much their owners gave them, although some were expected to grow some of their food for themselves.
python in fact some pythons have been known to grow to almost 40 feet they grow to the food source so the more food there is the bigger they grow.
Because of food webs and chains. Without one animal gone, the food chain is not complete. The other animals will die out or grow too much. They all help each other.
Because if you live in the UK, we cannot grow much food, so our food has to be exported from other, hot countries that can grow this food. Therefore it has to travel far distances DUUH