We removed any UK cities for which we could not find all of the data. As a result,
we used a total of 56 cities within our rankings.
We used GOV.UK data to find estimates for the total
CO2 emissions for each city in 2019 and 2020. We then added these two totals
together before dividing this number by two to find the average CO2 emissions for
each city between 2019- 2020.
We used government data denoting the estimated CO2 emissions from 1991 and 2021 for
the following sectors: transport, energy supply, residential, business, industrial
processes, public, agricultural, waste management, land use, land change and
forestry. We subtracted the 2021 total for each sector from the 1991 total before
dividing this by the 1991 total and finally multiplied this by 100 to calculate the
percentage change of CO2 emissions between these dates.
We used the Keywords Explorer feature on AhRefs to collect a range of eco-conscious based questions.
We then used Google Keyword Planner to add up the total number of eco-conscious
question searches for each city between Nov 2021- Oct 2022 as well as the population
for each city. By dividing the total number of searches by the population for each
city and multiplying this number by 100,000, we were able to calculate the number of
searches per 100,000 residents.