The construction of this year's Serpentine Pavilion removed 31 tonnes of carbon from the atmosphere, according to a report by construction consultant AECOM.
As a result, the structure can claim to be carbon negative, meaning that it will remove more CO2 equivalent from the atmosphere than it emits, up to the point it is dismantled.
"The total cradle to grave embodied carbon emissions of the pavilion are -31,000 kg of CO2 equivalent," the report states.
The Serpentine Pavilion 2021 opened to the public last week
However, the assessment did not take into account the carbon emissions that will be generated when the pavilion is moved to a new location at the end of the summer.
This will require the construction of new foundations but since the location is unknown, AECOM said it has been unable to calculate the carbon impact. Negative carbon "a surprise"
"There are a number of options available, all of which have a substantially lower environmental impact than the concrete used at Kensington Gardens," AECOM said.
"The initial assessment of these options has shown that a net-carbon negative or, at worst, a carbon-neutral build can be targeted in a whole life cycle assessment of the relocated pavilion."
"These options will form part of the handover documentation to the new owners," AECOM added.

The construction team said it didn't expect to achieve negative carbon with the project.
"The goal here was to do a low-carbon build...