How mushrooms clean up the planet (and other fungi powers)

Scientific Concepts, Discoveries, and Nature Phenomena

• Fungi as a major, mostly invisible component of ecosystems

  • Fungal networks (especially mycelium) connect and support global ecosystems.
  • Mushrooms are described as the fruiting bodies of a much larger underground organism.

• Mycelium as an organism and superlative scale

  • Mycelium is a rootlike fungal web.
  • Example: “Humongous Fungus” (Oregon) reported to spread over ~9 km² and estimated to be up to ~8,650 years old.

• Decomposition and nutrient cycling

  • Fungi can break down lignin (a key wood component) and help recycle nutrients from dead plant/wood material.
  • This decomposition is framed as essential so nutrients return to soils and support plants and other life.

• Fungal bioremediation: degradation of pollutants

  • Fungi can degrade not only natural organic matter but also organic pollutants.
  • Mechanism (as described):
    • Pollutants (e.g., fuel oils) are degraded via enzymes similar to those used for wood/leaves.
    • Contaminants are broken into smaller, less harmful compounds, potentially returning to the nutrient cycle.
    • Some breakdown products form CO₂ and water.
  • PAHs (polycyclic aromatic hydrocarbons) are highlighted as particularly concerning pollutants in crude oil.
  • Study example: Oyster mushrooms grown on heavily oil-contaminated soils
    • After 8 weeks, contaminants decreased by ~99%
    • PAHs were broken into less toxic substances

• Bioremediation of metals and radioactive elements

  • Fungi (and fungi-assisted plant systems) are described as able to treat soils contaminated with:
    • arsenic, lead, mercury
    • radioactive elements
  • Chernobyl (1986) is cited as context where radioactive contamination requires long-term remediation.
  • Example near the reactor: fungi with host plants
    • Strontium uptake: a trial reported sunflowers could take up radioactive strontium during a 12-week growth period
    • After harvest, plants are burned; enriched ashes stored more safely
  • Described processes: fungal/plant-fungus systems can
    • change element mobility
    • fix elements in soil
    • absorb them
    • help plants take them up
  • Industrial-site example (Russia): fungal samples accumulated up to ~40× more nickel and copper than surrounding soil.

• Practical limitations and feasibility

  • Success in experiments can be inconsistent (many setups work, some fail), suggesting difficulty translating research into guaranteed remediation schemes.
  • Fungal soil treatment is framed as more eco-friendly and cheaper than conventional removal/burning, but:
    • scaling to forests/mining regions is difficult
    • local species may be necessary (introduced fungi may not establish)
    • effective local solutions take time and patience

• Mycelium-based materials for construction

  • Using fungal mycelium to convert agricultural residues into building materials.
  • Example: A 2014 New York tower using ~10,000 mycelium bricks
  • Reported properties:
    • inexpensive to produce; can be grown in many conditions
    • strong for weight; lightweight brick
    • non-flammable (as claimed)
    • good insulation
    • low-carbon alternative to concrete/steel
    • can be rot/biodegrade when demolished
  • Environmental motivation:
    • Concrete/steel production contributes ~10% of global CO₂ emissions (as stated).
    • Crop residue burning (e.g., Delhi winter air pollution) is contrasted with using residues for mycelium bricks.
  • Example process described: crop residues (corn) seeded with fungus → mycelium colonizes in ~1 week → dries into solid brick
  • Durability/workarounds:
    • Main challenge: durability and moisture absorption if damaged
    • Proposed solution: use mycelium bricks as a wall core with protective exterior moisture layers
    • Combining mycelium with other compostable materials (e.g., bamboo) and designing frames to manage stress to mitigate material limitations (University of Karlsruhe mentioned)

• Broader societal and historical context

  • Mentions ancient use of fungi at least ~6,000 years ago for spiritual/transcendental experiences.
  • Also references modern antibiotic discovery as revolutionary, supporting the idea that fungi may contribute beyond medicine—into environmental cleanup and materials.

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Methods / Approaches Outlined

Fungal Bioremediation Using Mycelium

• Introduce or promote fungi capable of degrading pollutants in contaminated soil.
• Rely on fungal enzymes to break down organic contaminants (e.g., PAHs) into less harmful compounds.

Plant–Fungus Remediation Systems

• Grow host plants with associated fungi to enhance uptake of contaminants (e.g., radioactive strontium).
• Harvest and store enriched biomass/ashes safely after growth.

Mycelium “Upcycling” into Construction Bricks

• Seed agricultural crop residues with fungal species.
• Mold and allow mycelium to colonize/agglomerate residues.
• Dry into brick form; protect/engineer for moisture and durability for use in low-rise housing.

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Researchers / Sources Featured

• Erika Kothe — mycologist, University of Jena (Germany)
• Udeme Dickson — lecturer in analytical environmental chemistry, University of Reading (UK)
• David Benjamin — Associate Professor for sustainable architecture, Columbia University
• “The Living” — architectural team (2014 project referenced)
• University of Karlsruhe — referenced for durability/material engineering claims
• Archaeologists — referenced (Arab peninsula fossil discovery; specific names not given)