People in richer countries can afford meat more easily than less financially privileged people.  Raising animals for meat requires large amounts of land, also less available in poorer countries.  Eating meat cause "rich people diseases" like heart disease.  Raising livestock causes deforestation and methane production.

I am saving my used coffee grinds at home to use as compost for my plants.

Our biggest water issue is going to be saltwater intrusion as sea level rises.  I think most people have no idea that our drinking water is at risk.  Education is the first step.

I stopped using disposable coffee cups and instead use my own coffee mug in the morning.