Why is buying local fruits, vegetables and goods better for the economy?

Thranax is correct. Larger farms tend to get money from the government versus your local farmer who, more likely than not, has invested their own money into the farm.

When you buy local, you keep your local economy flowing. The money you spend doesn't go elsewhere in the country, which in turn, keeps your city monetarily healthy. So in essence, you will get your money back.

Similarly, when we get various produce overseas (such as bananas), we are essentially, stimulating the economy of another country and taking money out of our own pockets.

Short Answer:

The reason why buying local produce is better for the economy is due to the fact large companies stockpile profits. A local farmer is too small to not spend the money generate. It means your capital will most likely be moving 2 times or more in the economy before it reaches a stop in a bank vault. As long as money keeps moving, the economy is healthy.

~thranax~