The Eden Project is now open daily. All visits must be pre-booked online. Read our FAQS.

Together with visionary architects, engineers and suppliers we've made lots of choices about materials and designs to try to keep the environmental impact of these buildings as low as possible. Here are some of the things we've tried to do:

Green features

Super insulation

We pioneered the use of a really good insulating material to keep our plants warm in the Biomes. The hexagonal cushions on the steel structure trap air between two layers of ETFE (short for ethylene tetrafluoroethylene) which act as a thermal blanket.

To keep our visitors and staff warm, we've insulated our buildings with recycled newspaper. We also created a green roof on top of one our staff buildings behind the scenes, which helps keep it warmer in winter and cooler in summer. Birds and insects like it too.

Energy generation

We have prioritised lowering our energy consumption rather than simply installing renewable energy technology for the sake of it. However, we did include photovoltaic panels on the Core roof to be able to demonstrate to our visitors just how powerful these natural sources of energy are.

Learn how we're tackling energy use at Eden.

Water harvesting

As well as reducing our water use in the first place, by installing low-flush toilets, and taps which turn themselves off, we harvest our own water to flush the loos and water the plants.

Read more about our approach to water.

Natural light

Designing buildings that let in lots of natural light can mean electricity savings (if the windows are well insulated) as well as happier, more alert people.

Sustainably sourced materials

There's a lot to think about when choosing construction materials – how they're made, how far they have to travel, how long they'll last. There's no one-size-fits-all solution; instead, at Eden, we try to opt for the best material in each case, weighing up different considerations, including:

Recycled materials

You can find some innovative examples of recycled building materials in the Core: the green tiles in the floor were originally Heineken bottles, the entrance mats are made from recycled truck tyres, and the cafe floor is made of reclaimed wood.

Responsible manufacturers

We talk to our suppliers about how they've manufactured the materials we buy – and in some cases have even asked them to consider doing things differently for us.

For example, the sourcing of the copper for the roof of the Core marked a new approach in the mineral supply chain that pioneered single-source traceability. Rather than obtaining copper on the open market (whose origin is mixed and cannot be determined), we worked closely with the international minerals company Rio Tinto to source it. The copper was tracked from a single source – a mine which had ISO 14001 environmental certification for environmental management systems – across the world to the fabricator KME, in Germany, and from there to its installation at Eden. Find out more about this in our pdf report.

Low-waste manufacturing

When we can, we go for products whose manufacturing doesn't create unnecessary waste. The beautifully curved beams you can see in the ceiling of the Core were constructed using Glulam (glue-laminated layers of timber), a strong material whose offcuts are used as a fuel.

Fewer materials

Our buildings were designed to need as few construction products as possible. For example, the Biomes' hexagons copy nature’s honeycombs: maximum strength using minimum materials.

Lower-carbon products

Construction materials can result in a lot of carbon emissions, either through an energy-intensive manufacturing process or because they have to be transported a long way to the point of use. Furthermore products sometimes aren't durable, meaning they'll need to be replaced in the near future. Find out how this affected our decisions when building the Core.