Sustainable sourcing means finding and using things in a way that doesn't hurt the Earth. When we buy things from a store, like toys or clothes or food, we need to make sure that the things we buy didn't come from places that hurt the environment, like cutting down too many trees or using too much water.
That's why some people make sure the things they buy come from places that take care of the Earth. They might look for toys made from materials that don't hurt the environment, like bamboo or recycled plastic. Or they might buy clothes made from organic cotton, which helps keep the soil clean and healthy. And when they buy food, they might look for things that are grown without using too many chemicals or pesticides that could make the soil and water dirty.
By choosing sustainable sourcing, we can help keep the Earth healthy and happy for a long time.