Polydome is a revolutionary approach to greenhouse agriculture that offers the possibility of commercial scale, net-zero-impact food production. The Polydome system strategically interweaves a wide variety of crops and animals, taking advantage of every inch of the greenhouse while eliminating the need for synthetic fertilizers and pesticides.

Polydome is an answer to a part of the world food crisis. With its high yields (60 – 90 kg per square meter), and diverse outputs (over 50 crops, two mushroom varieties, chickens, eggs, fish, and honey), even a small Polydome system can sustainably provide a varied food supply for a large population. Scalable. Proftiable.

Polydome has been extensively researched by Except and over 12 partners in the industry. Concept overview and technical details are published in a free open source book, downloadable below.

This urban redevelopment project of the Fort Point district in Boston, MA proposes a unique strategy to reduce city-wide traffic congestion, increase livability and property values and contributes significantly to the resilience of the city as a whole.

We developed a sustainabile conversion and development plan for the post-war social housing area Schiebroek-Zuid in Rotterdam.  The project provides a flexible and exemplary roadmap for converting the neighborhood into a self-sufficient and sustainable area. It applies innovative energy solutions, urban farming, social and economic programs, secondary currencies, and adaptive redevelopment strategies.

This project was commissioned by housing corporation Vestia and agricultural research network InnovatieNetwerk.

The San Francisco Transbay Center redevelopment project realizes the world’s largest rooftop park in the center of one of the world’s most exciting cities: Salesforce Park. The concept, developed by Except together with Pelli Clarke Pelli Architects, restructures an existing transport hub into a beacon of beauty, biodiversity, and health.  The project started in 2007 and the park opened in 2019.

The Portal to Venlo offers the greenhouse industry in the east of the Netherlands a model to develop a sustainable industry. The project re-imagines an existing greenhouse industry area, currently fragmented, inefficient, dangerous for bicycle tourists that cross the area and in general rather unappealing.

In cooperation with the Dutch Foreign Office we  organized the trade mission to Detroit of May 2015 for over 25 organizations. The program established new permanent business partnerships of Dutch agri- and horticulture, and innovation companies with their American business, governmental and community development counterparts. Detroit, a  former powerhouse of the automotive industry, has suffered  from deindustrialization, a decline in population, an increase in crime, and general  decay. Yet, Detroit is a city full of resources and opportunities.

The event launched Detroit Urban Regen which aims to  revitalize  the city using smart agricultural solutions and creating a new biobased industry.  22 written pledges of commitment where secured, adding to the existing 15 international partners for Detroit Urban Regen.

Blue Green Infrastructures (BGI) increase the resilience of urban and rural landscapes, integrating their core functions with natural features and processes. Hurdles exist in the process of translating BGI-related knowledge and data from science to practice, and a tool that facilitates this transfer is still missing. We conducted a research in collaboration with a team of partner organizations (JNCC, IFLA Europe, BiodivERsA, and NRW), to pinpoint key preliminary knowledge to design such a tool, and collected our key findings in a report downloadable on this page.