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10

Concrete is made from sand, grit and (portland) cement; portland cement is made primarily of clinker. Almost all concrete at the time of writing is unsustainable. The extractive industries that provide the aggregates are very destructive, and the clinker manufacturing process releases huge amounts of carbon dioxide: about half a tonne just from the chemical ...


9

I think you're right that building your own is likely to be necessary (we're in the same position). What I've discovered in Australia is broadly applicable in the global north, so: An earthship can't be sustainable, and is not designed to be sustainable - they are about being self-contained within a very narrow definition of the term. They rely on free ...


8

I suggest that you question some of your assumptions. Difficulties of off-grid. Off-grid is HARD, and generally isn't worth it unless you are a long ways from the power lines. If you are looking at one acre, you probably aren't that far away. Let's look at what goes into off grid: Electricity Grid connected solar means you size your PV to provide about ...


5

Since you don't indicate in which country you're thinking of implementing this plan, I'm going to write from my perspective in the US, considering chain hotels (Marriot, Holiday Inn, Hilton,, etc) that make up the majority of hotels here. I can think of several ways in which a building constructed as a hotel would have greater environmental costs than a ...


4

Even though rock is a poor heat conductor for example in geothermal wells that slowly become cooler over time as heat is extracted, you cannot use sand as a general purpose heat insulator in houses. The coefficient of thermal conductivity isn't just small enough. Sand has a coefficient of heat conductivity of about 1-2 W/mK. A real insulator like expanded ...


3

I'm not aware of any dog that can go up against a brown bear and survive. Even wolves have trouble -- a brown bear can easily steal the kill from a small wolfpack. Your best option is probably a noisy dog that can alert you and let you take whatever non-lethal measures you feel are appropriate (rubber bullets, bear spray, etc.) And be ready to follow up ...


3

No. The letter rankings cannot be compared between nations in the EU, as each nation has a different number of grades (or no grades at all). From "A comparative analysis of the energy performance certificates schemes within the European Union: Implementing options and policy recommendations": This is because each nation has its own method (within EU ...


2

We would like to implement as many sustainable strategies as possible, ideally being nearly off-grid, with solar panels, rainwater storage, grey water recycling, humanure / methane tank toilets, ventilation based on good design, etc. Forget it. For example, my house (105 square meters) has perhaps 3500 kWh of electricity used and 13000 kWh of heat used per ...


2

You will not be able to sustainably hunt and fish on land you actually own. You can't buy enough land unless you are wealthy. Hunter gatherer bands typically have hundreds of square miles per band, and often had a seasonal migration route. E.g. Move to a particular prairie region to harvest camas bulbs; to a stream for the salmon catch; to a marsh for the ...


1

There is something to be said for both tiny houses and RVs. This Treehugger blog lists a number of pros for both. In short tiny houses: ... look like a house. Tiny homes are more weatherproofed. One can choose the materials and finishes that one wants in a custom-made tiny house. Customization. Tiny homes come in all shapes, sizes, builds and aesthetics. ...


1

Your system fails immediately when prices rise. Since prices rising is inevitable, your system will inevitably fail. Even if it did work for a year, you hit diminishing returns right-away, and there goes the motivation for further/continuing effort. This is a problem that cannot be solved by playing with numbers on a spreadsheet. Group rewards don't ...


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