High tunnels and hydroponics are extensions of the fossil fuel supply line. The plastic covering requires barrels of petroleum and gallons of natural gas both for feedstock and the energy to manufacture.
The support structures require energy for manufacture and for mining in the cases of aluminum or steel. The mixtures require energy.
These are not sustainable, they are not green; they are not environmentally safe.
Are you a newspaper subscriber but you don't have a Digital Access account yet? https://secure.forumcomm.com/?publisher_ID=40&event=subscriber/lookup.
You will need your subscription account number and phone number. Not sure if you have an account? Email us at email@example.com and we can help you.