Urban forests are critical components for keeping our cities cooler and safer. Street trees, city parks, arboretums, and the like help with stormwater management, restore biodiversity, and mitigate the effects of urban heat islands. But when those urban forests are thinned and trees are felled to create more space for recreation, or to protect raised utility lines, the wood itself gets chipped or sent away to get burned for energy production.

The most recent estimates from the USDA Forest Service indicate that 46 million tons of sellable wood from urban areas is felled each year, most of which gets chipped, landfilled, or burned. There is a missed opportunity afoot; not one of those pathways – with the possible exception of biomass power generation – involves making something of tangible value that’s inversely proportional to the amount of waste being generated.

The Massachusetts-based timber product manufacturer Tridome Structures is rethinking a pathway for urban wood. Very recently, the company opened a sawmill in the Boston suburb of Millis; this new subsidiary is called TimberWise. In this episode, I connect with Edward (TJ) Thompson, Tridome's co-founder and Director of Innovation, to discuss the TimberWise mill, and how this relatively small operation is changing how we manage urban forests.

There’s just one issue: the steel industry is cleaning up its own act. Instead of melting pig iron in a coal-fired blast furnace, big steel makers have made the shift to electric arc furnaces. Now, this isn’t a problem in the strictest sense; electric arc furnaces emit significantly less carbon into the atmosphere. But the slag yield from this newer, cleaner production process, creates an inferior and chemically inert SCM. It’s a new form of waste, and it has no place to go.

Carbon Upcycling has a solution. The company has established a waste-to-value supply chain by turning something very few industrialists were paying attention to, into a sustainable feedstock. The company’s CEO, Apoorv Sinha, says he wants to convert industrial waste in virtually all forms into sustainable feedstocks. But you gotta start somewhere, and somewhere, in this case, is the global cement industry.

In the company’s efforts to Fix and Store Carbon (two other tenets), Bioforcetech manufactures a distinct form of biochar called OurCarbon. Biochar is made when biomass sources like trees and plants undergo pyrolysis to yield an ashy and sterile carbon byproduct – has been used to improve soil fertility and boost agricultural yields.

OurCarbon is a form of biochar. But where it comes from, how it’s produced and scaled, and what it’s used for all represent something truly new in the waste-to-value economy.

Lew’s environmental advocacy began decades ago with the emergence of the forestry stewardship movement and has since expanded to encompass a broader range of carbon removal solutions focused on restoring our climate.

Our conversation delves into the topics of Carbon Dioxide Removal (CDR) and waste-to-value solutions, highlighting the evolution of these areas and their impact on climate action and sustainability. It explores the challenges, advancements, and applications of CDR, as well as the local and global impact of waste-to-value initiatives.