Walipini Update

It has been a while since I’ve written about the walipini, but it has been getting steady work over the last year. A walipini is an in-ground greenhouse. It uses the thermal mass of the earth to help keep its internal temperature from fluctuating too quickly in the winter. It is essentially a pit with … More Walipini Update

Solar Hot Water Panels Year 1 Data, sort of — Lab Note 1.08

Last year I built prototype solar panels and summarized the preliminary data gathered in some test runs (see this project’s archive here). I’ve been collecting performance data over the last year and am now ready to present the results. Data Collection The data for this analysis comes from three temperature loggers (Elitech RC-4, P.S., we … More Solar Hot Water Panels Year 1 Data, sort of — Lab Note 1.08

#GivingTuesday: Help a Different Type of Sustainability Nonprofit

The last five years have been the hottest ever recorded. Sea levels are at the highest in human history . . . the point of no return is no longer over the horizon. It is in sight and is hurtling towards us. The United Nations’ Secretary General, António Guterres, stated this at a press conference … More #GivingTuesday: Help a Different Type of Sustainability Nonprofit

Grow Your Own — Part III: Rules for the Experiment

We should define the parameters under which we’ll be carrying out this simulation. You can read about the inspiration and overall idea for this experiment in Part I and the chronological outline in Part II. Here we’ll drill down on exactly what we’ll be doing. 1. We will concentrate our growing efforts on about half … More Grow Your Own — Part III: Rules for the Experiment