There is an easy way and a hard way to get ripe tomatoes in December.

The easy way is to head to your local supermarket and buy them. The hard way is to raise them, pick them green in late October or early November, put them in a box in the basement, cover them with a newspaper, and then be patient.

This latter ritual used to be practiced by nearly every American household, but we have collectively lost the skill, the need, and the desire, since food is cheap and readily available year round. However, there are good reasons why a renewed reliance on locally and regionally grown food will need to be developed by more than just us die-hard “foodies.”

Jim Hightower once observed ripe tomatoes falling out of a truck and bouncing on the highway in front of his car, and the sighting inspired his book, Hard Times, Hard Tomatoes. Tomatoes should have many qualities, but bouncing is not one of them. The modern, season-less tomato has been bred for two purposes, to ship well and to look good. Flavor is not a part of that equation, which is reason enough to leave them alone until summer.

However, there is another reason why buying jet-lagged tomatoes in the middle of winter is not such a hot idea. It takes more calories, from fossil fuels, to grow and ship a tomato than we get from eating the tomato. The world’s oil supply is running out; we have probably seen the last of cheap oil; and all but a handful of old-guard climate scientists agree that fossil fuel burning is creating global climate change. Everyone needs to be concerned that there nothing waiting to take oil’s place in our economy.

Shipping water, in the form of tomatoes, around the planet is not the only way that we expend fossil fuels in order to get those crunchy tomato-like facsimiles to your local grocery store. The nitrogen fertilizers and toxic pesticides used on the bouncing tomato are also made from fossil fuels.

Then there’s the big machinery. Hightower wrote about that wonder of agricultural science, the tomato picker, developed by the University of California. These machines require that fields be leveled with bulldozers using lasers. Farmers without laser-levelable fields are out of luck, and of course so are the human pickers. In just two years after the release of this machine, 900 farmers and 9,000 farm workers lost their living.