3 metrics with data for both countries. The solid line is Saint Barthelemy; the dashed grey line is United Kingdom.
The share of people with safe drinking water at home, available when needed and free from contamination. WHO/UNICEF JMP via Our World in Data
Average exposure to fine particles small enough to enter the bloodstream. The WHO guideline is 5 µg/m³. World Bank / van Donkelaar et al. via Our World in Data
The share of people living in towns and cities. Urbanisation shapes energy use, land use and how people experience climate change. UN World Urbanization Prospects via Our World in Data