earth4Earth: Transforming Soil into Carbon-Negative Structures

earth4Earth Technology (e4E) is setting a new standard in sustainable building practices by creating carbon-absorbing bricks from excavated soil that would otherwise go to landfill. With a mission to decarbonise the construction industry and improve planetary health, e4E’s innovative products transform buildings into active carbon sinks while supporting a fully circular material lifecycle.

e4E bricks are fully recyclable, as they can be crushed and made into new bricks or returned to the earth for crop growth at end-of-life. The carbon stays in the crushed material as it is chemically bound in the form of stable carbonates.

Co-founders Professor Theodore Hanein, Professor Yi Luo, and Dr. Lei Zhang launched e4E in 2023, inspired by the centuries-old Fujian Tulou earth buildings in China — renowned for their durability, breathability, and indoor air quality.

From their R&D Centre in Sheffield, UK to the pilot manufacturing site in Wuhan, China — and soon expanding to UK production in 2026 to create over 30 local jobs — the company is shaping a future where building materials actively heal the planet.

In the factory, every step is engineered for minimal waste and maximum efficiency. No fossil fuels are used in the binder production, and instead of energy-intensive firing, the bricks are compressed at room temperature, dramatically reducing environmental impact.

This process is powered by DCUS Technology, which delivers innovation at every stage:

• Decarbonisation: Room-temperature lime production, no fossil fuels burned and no CO2 emitted from treatment of the raw materials.

e4E bricks are compressed, rather than fired, also saving significant CO2 emissions.

• Carbon Capture: The binder in the bricks captures and permanently stores atmospheric carbon through a carbonation reaction. This happens throughout the brick’s entire life cycle, so from the moment it is created and during the entire time it is used in a building.
• Usage: Once it is absorbed, the carbon further strengthens and enhances the properties of the material.
• Carbon Storage: At end-of-life, the bricks can be crushed and used in new bricks or added to soil for crop growth. The carbon stays in the crushed material as it is chemically bound in the form of stable carbonates.

Independent testing by EPD Hub has confirmed that earth4Earth’s N10 Negative Carbon Brick is genuinely carbon negative. Over its full life cycle, each brick absorbs more CO₂ than it emits, capturing around 0.178 kg of carbon through natural carbonation. Even after accounting for production, transport, installation, and end-of-life, the bricks deliver a net climate benefit — enabling buildings to become part of the solution to global warming. An EPD for the other products is currently in progress.

• N10, N20, N30 Bricks: They contain 10%, 20% and 30% of the e4E binder. As the percentage of the binder increases, so does the level of carbon absorption.

• L10 Brick: Uses conventional lime but still captures CO₂. It is designed to reduce carbon dioxide emissions during its production and use. It contains 10% traditional lime.

• L0 Brick: Earth-based, no binder, ideal for specific heritage applications. It only contains soil and sand.

• Carbon-absorbing product: Each N10 N20 and N30 brick absorbs CO₂ during its service life through natural carbonation, with N10 providing a verified net negative carbon footprint.
• Improved indoor air quality: The breathable, earth-based composition naturally regulates humidity, contributing to healthier and more comfortable indoor environments.
• Use of excavated soil: Manufactured from excavated soil that would otherwise go to landfill, turning construction waste into a high-value building resource.
• Highest fire resistance (A1 rating): Certified to A1 fire safety standard, ensuring maximum protection and compliance with stringent European requirements.
• Available in natural colours: The bricks feature vibrant, earthy tones that provide a unique and sustainable aesthetic without additional finishing.
• Return to earth at end of life: Bricks can be crushed and reused in agriculture, safely returning nutrients to the ground and supporting a circular lifecycle.
• Great durability: Proven performance with F2 frost resistance, exceeding the durability of many traditional clay bricks and ensuring long-term structural stability.

Join earth4Earth in building a decarbonised future. Explore the full range of products and their product specifications on the 2050 Materials platform.