I'm so green that I mixed the LIMEcrete slab in my cellar by hand and with rainwater collected in my 3 water butts. Not only that, I used beeswax candles to light the cellar while I worked.
Then I made a cast-in-situ limecrete worktop around my recycled kitchen sink, mixed by hand using rainwater.
All my lime rendering is mixed with rainwater, though I did use a cement (sorry about the use of the "c" word) mixer. But, before you chastise me for using a 20% nuclear powered mixing device, I must point out that all my light fittings are low energy.
Also, my cooker and my central heating run on wood.
I also occasionally fill my pickup truck with biodiesel.
I am greener than you!
T :-)