In article
songbird writes:

the thing is, that if you get everyone to put in
a few hours here or there it isn't that bad. right
now we are two people who sort of garden a few
thousand square feet, it's not intensively done or
even with a lot of fiddling, and while we may not
have perfect results it still provides a great deal
of food.

Accepting wikipedia's numbers for the sake of debate, New York City
(proper) has an area of 304.8 square miles and a population of
8,405,837. According to my calculator, that works out to about
1010 square feet per person. Take out the space used by roads,
walkways, parks and non-flattop buildings. How well do you think
they will eat if they put in a few hours each, but you take away
the farm influx?

And at ~27k/sqmi, NYC doesn't even come close to getting on wikipedia's
list of top sities by population density. Looks like Manila works
out to about 250 sqft/person.

What you say can be done, but it cannot be done for the current
global population.


--
Drew Lawson | What you own is your own kingdom
| What you do is your own glory
| What you love is your own power
| What you live is your own story