[bhuthesh_r]

From http://data.worldbank.org/topic/agriculture-and-rural-develo... : For the 70 percent of the world's poor who live in rural areas, agriculture is the main source of income and employment.

[proksoup]

It would make more sense to me to say:

"The purpose of the economy is to grow food sustainably."

Then it would it say:

"The purpose of sustainable agriculture is to support the economy"

The economy is a tool we use to manipulate our own behavior. The idea that it's a goal in and of itself is pretty confusing to me.