Environmental and technological technologies are two distinct approaches that can distinguish between them.
Technology for the environment considers every technology and its effect on the environment through its inputs, throughputs, and outputs. It includes, for instance, more efficient, greener, and less resource-intensive technology that can reduce inputs to materials, cut down on emission and energy consumption, or even recuperate valuable products.
Environmental technologies, in contrast, are technologies designed for the sole purpose of solving ecological problems. They include, for instance, techniques for treating sewage and water purification. They also help reduce the issues associated with the disposal of waste processing pollutants or the correct treatment of hazardous wastes and toxic substances.