How You Can Easily Make A Very Simple, Inexpensive, Effective Trombe Passive Solar Wall From Stones And Wire...

The Trombe wall is a passive solar building technique where a wall is built on the winter sun side of a building with a glass external layer and a high heat capacity internal layer separated by a layer of air. Heat passes through the glass almost unhindered then is absorbed by the wall that then re-radiates and doesn't  pass back through the glass, hence heating the inside of the building. Trombe walls are commonly used to absorb heat during sunlit hours of winter then slowly release the heat overnight.
It was developed as an architectural element by the French engineer Felix Trombe with architect Jacques Michel in the 1960's.
All you need to do is site the wall, make up a timber frame, use a wire mesh on either side of the frame and start filling in layers so you're not dropping the beautiful river stones from a height.
The darker the river stones the better as they'll absorb more heat.
You're sure to figure it out...

If You're Thinking Of Building A Recycled Plastic Bottle House...

If you're thinking about building your own tiny house or shed from recycled plastic soda bottles there's lot's of information out there.
Back in 2011, Nigeria's first one was made with this plastic consumerable that otherwise might might have ended up in a landfill or worse as a pollutant to our oceans.
With literally millions of these soda bottles littering our countrysides we need constant reminders that they are not just waste but a valuable resource for us to use.
In the Nigerian situation, the free bottles were filled with sand or soil and the thickness of the bottle lined walls makes them earthquake resistant and even bullet proof. Which will be handy for those who live in dodgy areas.
And the interior's temperature can be maintained at a most enjoyable temperature all year round.
So what's stopping you...