Land stewardship is a major buying factor that motivates buy local campaigns. People are most concerned about how well maintained the land is near where they live, since it affects them drastically. Therefore they are most likely to respond to land stewardship problems (erosion, deforestation, pollution, water table issues, soil depletion) visible nearby.
However, land stewardship is equally important or more important when you consume products from far away, where very bad outcomes as not visible to you. There is some awareness of these issues for food products, such as cocoa, but also mined for products like those using tantallum. Knowing the implications for the land your food is grown on, or the ores in your mobile device are mined from, is the first step to a healthy buying infrastructure where you do not participate in processes that morally repel you, and make everyone's life on Earth harder.