National Highways has continued its greenwashing of the Lower Thames Crossing but its pledge to wish away emissions from the construction of the unaffordable scheme is full of holes.
Last week the company claimed in a press release:
The project aims to cut its construction carbon footprint by 70% by aggressively targeting carbon as it refines the design of the new road and adopting new materials and methods of construction as they emerge. It has also made a legal commitment to responsibly offset any remaining carbon emissions using best practice, and only in the early 2030s once efforts to reduce it during construction are exhausted.

I have written extensively about how the government-owned company invented a purely notional figure for construction carbon emissions, which it now says it will cut by 70%. One part of this scam was to imagine that the project might not use ground-granulated blast furnace slag – a widely used lower carbon cement substitute – and then to claim a saving from deciding to use it after all.
I also reported that, although National Highways claims to have carbon limits built into its contracts with the companies that will build the tunnel, it will not disclose what penalties will result from non-compliance, raising concerns that contractors may find it cheaper to pay the penalties.
National Highways has banned contractors from using offsetting to meet these targets but its Carbon and Energy Management Plan for the scheme does away with any claim that the targets represent any kind of a cut. It refers to “an upper limit for the use of carbon in construction, based on industry practice”, which implicitly admits that the original figure was using poor practice.



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