EnvironmentToxic foam from polluted rivers causes health problems in Colombia Clouds of foam containing toxic chemicals are floating through a neighbourhood on the outskirts of Bogot谩, and residents say they it is making them sick 51动漫
TechnologyNanorobots clean up contaminated water by grabbing hold of pollutants Nanorobots propelled by magnets can be used repeatedly without fuel, offering a sustainable and cost-effective way to clean up industrial wastewater 51动漫