Alien diseases on Earth

Disease is something that is common to all living things. Bacteria, virus and even the body’s own cells can cause sickness and even death. The classic “The war of the worlds” had these little guys saving the earth when the attacking extraterrestrials found they had no natural immunity to earth’s viruses and bacteria. But there […]

Human Water Pollution | Biology | Ecology

although the domestic sewage generated by human waste is usually not directly poisonous to life as our chemical pollutants they do pose environmental problems by throwing existing ecosystems out of balance city sewage is treated in sewage treatment plants in special ponds and tanks where the organic wastes of sewage can be broken down by […]

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