Material Flow of the Month | Dispatch №7 By Rui Mendes | Porto Velho, Rondônia — September 2026 Monitoring Station MD-14 hits you with sound before anything else. Not the forest — though the forest is there, a wall of cicadas, frog calls, and tinamou whistles dense enough to feel in your chest. The sound …
Category Archives: Blogging
How Sensor Networks Monitor Ecosystem Health: The Instruments Watching Amazonia and the Andes
A sensor network for ecosystem health is a set of physical instruments left in place — water-level loggers, gas analyzers, acoustic recorders, camera traps, soil probes — that take repeated measurements where the ecosystem actually is, then move the readings somewhere a human can act on them. The vocabulary matters as much as the hardware. …
Why We Need Better Lifecycle Analysis for Digital Products
Lifecycle analysis — most people in the field write it as life cycle assessment, or LCA — is the standardized method for measuring what a product costs the environment across its entire existence: extraction of raw materials, manufacturing, transport, years of use, and disposal. The framework is defined by ISO 14040 and ISO 14044, and …
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Material Flow of the Month: What One Bioacoustic Sensor Array in the Cerrado Actually Costs the Planet
The dirt road to the Emas National Park field station cuts through cerrado sensu stricto—two-meter woody shrubs, twisted cork bark, grasses that crackle underfoot when the rains stop. Dr. Carla Holanda, a bioacoustics researcher affiliated with WWF-Brazil, unloads six acoustic monitoring units from the back of a Toyota Hilux. Each one is roughly the size …
How Blockchain Energy Consumption Compares to Small Nations
Blockchain energy consumption is the electrical load required to run consensus mechanisms, mining hardware, cooling systems, and network infrastructure across public ledgers. The most cited example is Bitcoin’s proof-of-work network, but Ethereum’s transition to proof-of-stake in 2022 changed the comparison landscape. For readers of e-guana.net, the question is not whether blockchains use energy, but how …
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The Problem With Planned Obsolescence in Consumer Electronics
Planned obsolescence is the deliberate design of products with a limited useful life, pushing consumers toward replacement before the device has exhausted its technical or material value. In consumer electronics, this takes the form of glued-in batteries, software updates that slow older hardware, proprietary screws, discontinued security patches, and repair monopolies. For a blog focused …
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How Citizen Science Apps Contribute to Ecological Research in Latin America
Citizen science apps are digital tools that let non-professionals record observations of plants, animals, water, soil, and weather, then share those records with researchers. In Latin America, these apps sit at the intersection of biodiversity monitoring, infrastructure expansion, and supply-chain pressure on biomes such as the Amazon basin, the Cerrado, and the Andean páramos. For …
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How Citizen Science Apps Contribute to Ecological Research
How Citizen Science Apps Contribute to Ecological Research Citizen science apps are digital tools that let non-professionals record observations of plants, animals, water quality, and land-use change, then share those records with researchers. In the context of Latin American infrastructure, supply chains, and biomes, these apps become a form of distributed environmental sensing. They sit …
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How Citizen Science Apps Feed Ecological Research—and Where the Data Hits Its Limits
Open iNaturalist on a Saturday hike in the Atlantic Forest, snap a photo of a butterfly, and you’ve just added a data point to one of the world’s largest biodiversity databases. That single observation, once confirmed by a couple of other users, can travel from your phone to the Global Biodiversity Information Facility (GBIF)—a portal …
The Hidden Footprint of Writing It Down: When Ecological Reporting Burns More Than It Reveals
On a morning in late July 2024, at a field station in the southern Cerrado, a team of ecologists was putting the finishing touches on a 340-page environmental impact assessment for a proposed transmission line corridor. The corridor would cut through 87 kilometers of savanna woodland, crossing three micro-watersheds and overlapping with the foraging territory …