My Lords, this a very full group of powerful amendments and I find them all very appealing. I particularly support the noble Lord, Lord Crisp, in his brilliant Healthy Homes campaign with the Town and Country Planning Association, but a completely convincing case has been made from all parts of the House for his amendment. I will concentrate on Amendment 280, to which I have put my name in support of the noble Lord, Lord Ravensdale, on creating a road map for addressing embodied carbon emissions in buildings.
It has been a rather rude awakening for me to discover that, in concentrating on the energy efficiency of buildings once occupied and taking measures to cut their operational carbon emissions when in use, I have been missing the bigger picture: half buildings’ emissions come from the process of producing and maintaining the building—that is, from the embodied carbon generated by the whole construction process. Many of us in the world of housing have focused on improving energy efficiency in new homes and have failed to recognise that we could be doing far more to cut the carbon emissions that result from the construction of those homes.
Construction, which uses more raw materials than any other industry, is responsible for a quarter of all carbon emissions. Half of these come from embodied carbon, particularly in the production of concrete and steel. Half a million tonnes of building materials are used daily in the UK. Moreover, demolition and excavation generate no less than 62% of all UK waste, to say nothing of the consequences for landfill and the nasty impact of air pollution.
I am very grateful to Shaun Spiers and colleagues at the Green Alliance for their work on “circular construction”: reducing the type and quality of raw materials, reusing, recycling and regenerating, rather than demolishing and building anew. Their work shows that there are plenty of ways in which this huge driver of carbon emissions can be addressed without adding to cost. An example is British Land’s new headquarters in London, which went for retrofitting in place of new build and took less time, while cutting costs by 15% to 18.5%.
A new embodied carbon section in the building regulations, referred to as Part Z, would send the construction industry down the right road. The Environment Act 2021 gives the Government the power to take this approach forward. Some neighbouring European countries are already getting there: for example, the Netherlands is committed to reducing raw material consumption by 50% by 2030. But what is needed first in the UK is an agreed set of metrics—an approved methodology—as the basis for calculating the whole-life carbon emissions, both operational and embodied, of construction work. Big players such as Lendlease, Atkins and Laing O’Rourke stand ready to help in devising this. The amendment from the noble Lord, Lord Ravensdale, provides the basis for that essential first step, with proper regard to the need for full consultation.
Frankly, I have been pretty ignorant about the significance of embodied carbon in construction. I now realise that concentrating on energy efficiency in the use of buildings once built misses the point. Key players in the industry are ready to adopt new practices to cut embodied carbon emissions. This amendment would enable the Government to progress this change of emphasis, which is surely overdue. I strongly support the amendment from the noble Lord, Lord Ravensdale.