Environmental and eco-friendly directories List. Free and paid directories dealing with the environment, environmentalism, ecological (eco), green, earth-friendly, renewable energy, global warming, organic, biodegradable, solar, wind, hybrid vehicles, sustainability consulting, global warming, sustainable architecture and composting. Information that can be used for creating a sustainable future. These sites are often related to environmental sciences. Eco-friendly websites that accept free or paid directory submissions. Business listings for free and paid website submission. Environmental directory list.