Carbonation Leads

Waste Wood to New Resources

Our Missions

Circular Communities

Carbon Sequestration

Waste Diversion

Renewable Materials

Carbon Sequestration

Why is Biochar Important?

Biochar is a solid "charcoal liked" material generated from the carbonization of biomass. Biochar has been applied in agricultural activities as a soil amendment. It helps retain soil's nutrients and improve soil functions. We convert waste biomass to biochar is to achieve carbon sequestration. It reduces emissions from biomass that would otherwise naturally degrade to greenhouse gases.

Biochar+ (Engineered Biochar)

Biochar is mainly used as a soil amendment and for carbon sequestration. CLS Environmental Technologies has developed technologies to expand the uses of biochar beyond soil applications.

Our goals:
-Enhance the functions and performance of biochar
-Develop more value-added biochar based products.

Biochar+ Products - Circular Materials

CLS collects woody waste such as bamboo scraps and wooden pallets from construction sites and convert them back to construction materials.
Our goal with our construction materials project is to create circular material solutions for the construction industry. Cement is a carbon-intensive material. The cement is the source of about 8% of the world's carbon dioxide emissions. If the we can replace 1% of cement with biochar, it will be equivalent of growing hundred thousands of trees.

Circular Economy Project

We create Value-Added Products  & Circular Operations for Industries

Creating Innovative products with Waste

Integrating Circular Economy Solutions for Companies

Our Team

Pirry Leung

Founder & CEO

Pirry has worked in environmental technology for 15 years. He has also been involved in multiple sustainability startups as well as founding several environmetal tech startups.  

Oliver Yeung

Founder & CTO

Oliver has extensive R&D experience in photochemistry and green chemistry. Prior to joining CLS, he was a senior research fellow at the Hong Kong Polytechnic University. Oliver received his PhD in Chemistry from the University of Hong Kong (HKU)

Shawn Cheng

Founder& COO

Shawn has led technical operations and R&D at an ozone technologies company. He is also the co founder of the 1st Hong Kong organic waste recycling company. 


MON-FRI 09:00 - 19:00, SAT-SUN 10:00 - 14:00