What are the processes, solutions and technologies to make the textile industry more environmentally sustainable?

Textiles, apparel and accessories represent an important industry sector, employing tens of millions, especially in developing countries. Its significant use of energy & resources, liquid effluents generated during operations, and large resource requirements (especially water) make energy and environment sustainability critical challenges for this industry. What could be the effective processes and solutions that have the potential to make the global textile industry far more sustainable?