Most of us have a proverbial “plan-B,” or at least a rough idea of how we would protect ourselves and our families in the event of an emergency. Having a temporary safe haven is at the top of the list. However, before you start, it’s important that you know how the project is impacting the environment, as construction can leave a heavy carbon footprint if you don’t take the necessary measures to minimize it.
Fortunately, there are green and eco-friendly options available to you. In three phases, you can construct a sturdy, safe and environmentally-sound backyard shelter to protect you and your loved ones in case of an unexpected crisis.
Phase 1: The hole
This is the easy part. To build a shelter, the first step is digging a hole that is at least 10 feet deep—20 feet if you’re one to err on the side of extreme caution. Though it is possible to dig your own hole the old fashioned way (i.e. with a shovel and manpower), a more efficient means of moving that much soil would be to rent machinery like a backhoe or excavator. Doing so will turn days of digging into a Saturday afternoon project.
Phase 2: The walls
After clearing the space for your bunker, you have to reinforce it. Normally, this is where the construction of your shelter would negatively impact Mother Nature: the most common material used to line and seal structures is concrete, but traditional concrete is mixed with cement, making it an environmentally unsound material. Why? Three reasons: production wastes energy, it is fossil fuel-intensive, and its manufacturing is one of the top offenders of carbon dioxide emissions (aka greenhouse gas). Additionally, making cement requires aggregate materials like stone and sand from quarries, further depleting natural resources.
– See more at: http://transitionvoice.com/2015/03/earth-shelters-building-an-eco-friendly-bunker/#sthash.jJErto5w.dpuf