They can put checks and balance on each other.
Answer:
HDI refers to Human Development Index and it’s a measure of the key elements and areas of how citizens of the country develop. These can be measured through their average income, health care etc.
China- 0.761 85th
USA - 0.926 17th
Japan- 0.919 19th
UK- 0.932 13th
Saudi Arabia- 0.854 40th
Iraq- 0.674 123rd
Drinking water in the community means that many people would dispose of waste in a bad way, they would create more pollution which is bad for the marine life, etc.
I think they could be solved if everyone could just follow the guidelines by recycling or doing good for the earth.