Growing What Money Can’t Buy

Living in Northern California at a time when the tech industry is booming and at a time and place where the faux “sharing economy” (websites that let you buy and sell any service you can imagine) is all the rage, I’m reminded quite frequently how people expect that they can buy anything. It’s just a … Continue Reading

No True Permaculture

I do a fair bit of gardening in public or semi-public spaces — sidewalk strips, parking lots, yards of large buildings, rooftops — and over the last couple of years I’ve had a lot of conversations with people passing by about gardening, fruit trees, sustainability, and lots more. One topic that has come up infrequently … Continue Reading

The Energetic Basis of Wealth

Last year I did an analysis to try to understand whether it’s possible to feed the world sustainably. Today I’d like to try to understand what happens to countries as they must rely upon the sun for energy (and, indirectly, wealth). An old proposition in the sustainability community is that the material wealth we enjoy … Continue Reading

Growing Degree Days

Most gardeners are familiar with the idea of hardiness zones — the USDA hardiness zone map, for example, breaks down regions of the U.S. by their expected minimum winter temperature. The idea is that, for example, in Zone 10a (which I’m in), which is listed as 30-35F minimum temperature, the expected low each winter will … Continue Reading

Growing Avocados

There isn’t much widespread knowledge about growing Avocado trees, especially outside of the few regions they’re grown commercially. I’ve been pretty singularly focused on growing Avocados in the last few years, but in sub-optimal climates, and wanted to share some of the hard-to-find information I’ve come across. (Disclaimer: I don’t claim any special knowledge beyond … Continue Reading

Rube Goldberg Nature

The more I learn about it, the more Nature looks like a Rube Goldberg machine: energy and materials flow through convoluted paths to accomplish something seemingly simple. Take the process by which a leaf decomposes. The sheer number of biogeochemical processes involved in the use of that leaf during decomposition is amazing: consumption by fungi … Continue Reading

Tree Debt Revisited

Another perhaps more straightforward way to look at tree debt is to consider the following: what population of trees do I need to personally plant and sustain to equal my carbon emissions? Thinking of it this way tries to equalize two rates: the rate of emissions on one hand and the rate of absorption by … Continue Reading

Trees, 2013

About a year ago I wrote about Tree Debt, the idea that we might measure our carbon emissions in terms of the number of trees that we’d need to plant to consume an equivalent amount of carbon from the atmosphere. After a few calculations, I arrived at a rough rule of thumb that those who … Continue Reading