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Population and the Environment: The Global Challenge

October 16, 2018

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Nepal - A MOST BEAUTIFUL & ADVENTUROUS (Naturally NEPAL

September 26, 2017

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Effects of Dumping Sewage Water Directly Into the Sea,

By Ekta rana update 30/09/2017 Effects of Water Pollution: When toxic substances enter a body of water, they will be dissolved, become suspended in water or get deposited on the bed of the water body. The resulting water pollution causes the quality of the water to deteriorate and affects aquatic ecosystems. Pollutants can also seep downand effect groundwater deposits. Saida's sewage and industrial wastes are discharged into the rivers. Because of this, pollutants enter groundwater, rivers, and other water bodies. Such water, which ultimately ends up in our households, is often highly contaminated and can carry disease-causing microbes. WHAT Is DOMESTIC SEWAGE? · Sewage originating primarily from kitchen, bathroom, and laun

Why scientists are counting seal pups in the Thames Estuary

Sixty years ago the Thames Estuary was regarded as "biologically dead" and largely devoid of wildlife. But, in recent years seals have returned to the Thames as well as to the coastal and low-lying lands bordering the estuary. Last year, scientists recorded more than 3,500 harbour and grey seals. Now, they are starting the first count of seal pups to see how important the area is a breeding ground. "These seals are higher predators in the estuary," says Thea Cox, conservation biologist at the Zoological Society of London. "Knowing how many there are is a really good indicator of the health of the estuary, what habitat is available to them, what food source is available to them. Just a short boat ride from Ramsgate, we come across a colony of seals basking on a sandbank. Some lie on the spits of sand lazily waving their flippers, while others swim towards our boat, showing off their diving skills. "To understand particularly how many pu

Water pollution: an introduction

O ver two thirds of Earth's surface is covered by water ; less than a third is taken up by land. As Earth's population continues to grow, people are putting ever-increasing pressure on the planet's water resources. In a sense, our oceans, rivers , and other inland waters are being "squeezed" by human activities—not so they take up less room, but so their quality is reduced. Poorer water quality means water pollution . We know that pollution is a human problem because it is a relatively recent development in the planet's history: before the 19th century Industrial Revolution, people lived more in harmony with their immediate environment. As industrialization has spread around the globe, so the problem of pollution has spread with it. When Earth's population was much smaller, no one believed pollution would ever present a serious problem. It was once popularly believed that the oceans were far too big to pollute. Today, with around 7 billion people

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