It is also important to analyse the relative volume, which helps measure the importance of a certain topic within the general conversation about sustainability.

Both in the UK and the US, sustainable construction represents between 1% and 1,7% of the total conversation about sustainability. The trend is stable in both countries, with extremely low slopes for both trends:

Slope for US: -0,000005084363272

Slope for UK: -0,000007045270381