Sustainability

For us, sustainability means making the best use of our resources while minimising our impacts on the environment and society.

Our founder, Sir Peter Scott, had an early and instinctive appreciation of its basic principles of sustainability. He argued that we have a responsibility to future generations to care for the natural environment and that “sooner or later, [mankind] will become much more widely concerned with optimum rather than maximum, quality rather than quantity”.

In carrying out our conservation, education and visitor attraction roles, we have an environmental impact, both positive (bringing people closer to wetland wildlife at our sites, our species and habitat conservation projects) and negative (through our buildings energy use and business travel).

WWT is committed to improving our sustainability and aim to embed sustainability in to everything that we do in the following areas:

Reducing our carbon footprint

Our Net Zero target relates to our direct emissions i.e. those from our buildings, tractor/plant fuel and business travel (public transport, cars and flights). These are known as Scope 1 & 2 and Scope 3 direct emissions.

The “net” bit of the Net Zero target means we will reduce our footprint as much as we can (and by at least 50% on the baseline) and then look to rebalance the remainder by additional carbon sequestration from our land holdings (current or new) or possibly from suitable verified offsetting schemes that directly benefit wetlands.

Our 2024/25 carbon footprint was 33% below the 2019/20 baseline.

We have achieved this reduction by energy efficiency (LED lighting, improved controls, energy efficient pumps), improved heating systems (infrared heating to warm the objects not the space), low carbon heating and renewable energy generation (solar hot water heating and solar power).

We purchase 100% renewable electricity but still include this in our carbon footprint.

We also measure the indirect emissions (Scope 3) from our supply (value) chain, investments, employee commute and those from our staff working from home although these indirect emissions are harder to quantify and reduce. They do not currently form the basis of our Net Zero target although this is continuously under review. We have sustainability targets associated with our highest impact suppliers and our investments. Some of our employees work from home which helps reduce our commuting impacts although not all roles lend themselves to this and we also recognise the value of staff connection especially on our wetland sites.

Materials

We assess the best materials to use in our grounds based on the expected use, lifespan and maintenance of the product. So sustainable and legal (e.g. FSC or PEFC) timber, suitable recycled timber products or recycled plastic products may be used in our grounds (picnic benches and tables, bins and boardwalks). Using recycled plastic products helps to stimulate the market for recycling plastics and can look great and often last longer than timber products. We’re also trialling acetylated timber products (treated with vinegar) which are particularly long lasting.

Where we need to buy growing materials, it is peat free.

In our cafes and restaurants, while we’d rather provide a reusable item (e.g. porcelain coffee cup or mug or plate), we recognise that some of our visitors sometimes want to take items away. So all of the takeaway packaging in our restaurants is either 100% recyclable or commercially compostable.

In 2016, the refurbished London Wetland Centre theatre opened, known as the Thames H2O, incorporating a range of recycled and reclaimed materials including a lobby feature wall made out of reclaimed wood from a former Victorian factory and carpet made from recycled fishing nets.

Welney Wetland Centre is a sustainable, award-winning, naturally ventilated centre constructed from non-chemically treated timber and incorporating newspaper insulation. Our Caerlaverock Visitors Centre is also insulated with newspapers.

Plastics

You can see some of the things that we have done to reduce our use of single use plastics with some suggestions on what you can do too.

Our restaurants only provide water and other drinks in cans, glass bottles and occasionally cartons. But you can always fill up your water bottle in our restaurants (we are part of the Refill scheme). We provide only paper straws. We don’t provide balloons for children’s parties.

Saving water

Did you know? Of all the water in the world, only 3% is fresh. Less than one third of 1% of this fresh water is available for human use i.e. if 100 litres represents the world's water, about half a tablespoon of it is fresh water available for our use.

Our Strategy commits us to ensure that our work considers and minimises our impact on all natural resources, but particularly on water.

We’ve got a range of water saving devices and “working wetlands” across our sites, as you’d expect from a wetland conservation charity. These include rainwater harvesting (rainwater collected from the roof and used to flush the toilets), composting toilets, low flush toilets, percussion taps and waterless urinals. Find out more about how you can save water in the home and garden.

Steart Marshes in Somerset is itself a large working wetland. It is there to help people and wildlife to adapt to climate change, as well as being a natural buffer, providing protection to the newly created flood banks while absorbing tonnes of climate polluting carbon as it matures.

All of our sites include wetland treatment systems – using the natural functions of vegetation, soil, and organisms to treat different wastewater streams. These enable our sites to operate in areas with no sewer connection while providing wider benefits including habitat creation and landscape features. They also reduce sludge disposal and pollution from transport. They can also potentially lower carbon and other gas emissions through no or low aeration and pumping requirements, have low running costs and reduce chemical use.

We also have Sustainable Drainage Systems (SuDS) in place at many of our centres. These mimic natural drainage systems and so reduce surface water flooding, improve water quality and enhance the biodiversity of the environment rather than directly channelling rainwater to the nearest river as fast as possible.

Waste

We manage all waste according to the Waste Hierarchy at WWT. Ideally, the best option is not to produce the waste in the first place. If we make waste, then where suitable, we look for reuse opportunities within and outside WWT. If we can’t reuse, we then look at recycling and composting options.

Eight out of our 10 sites now achieve zero waste to landfill.

We now have food waste collections at five out of our nine centres and have onsite compost bins for fruit and vegetable waste at two others. All of the six sites with food waste collections can also take the compostable packaging that we use for takeaway items from our restaurants.

At our sites

Many of our visitor centre buildings and hides incorporate green roofs. These create a habitat for wildlife, provide insulation, look great and can even help to lower urban air temperatures.

Some of our impacts come from our restaurants and shops as well as from the things we buy to use on our sites including for walkways and other landscaping. We have taken big steps to reduce these impacts in our shops and will be doing much more as part of our Sustainable Purchasing Policy. You’ll notice a range of “eco” products in our shops alongside the range of existing products including greetings cards, books and items to encourage wildlife.

At some of our centres, you will notice that our external waste bins say “we’ll sort it”. The waste from these sites goes to a MRF (material recovery facility) where suitable recyclable items are removed using magnets, blowers etc. and sent for recycling.

Our tea, coffee and hot chocolate is fair trade, our eggs are free-range, our fish and seafood is MSC (Marine Stewardship Council) sustainably sourced, our meat is Red Tractor Assured, we provide a range of meat free (vegetarian and vegan) options at our sites and source seasonal, products locally where possible.

Where any food items or beauty products contain palm oil, it is always from sustainable sources.

We now have public electric vehicles (EV) chargepoints in place at WWT Slimbridge, WWT London, WWT Caerlaverock, WWT Castle Espie and WWT Welney.