In this book, two eminent ecologists explain how the millions of species living on Earth-some microscopic, some obscure, many threatened-not only help keep us alive but also hold possibilities for previously unimagined products, medicines, and even industries

Barrages are major river structures. During the last century there has been a marked increase in research activities all over the world including South Asian sub-continent in developing theories and practices concerning design and construction of river structures on permeable foundations. In South Asia a large number of barrages have been successfully constructed on these theories. A number of more such structures are planned. It is for this reason. The author has made an effort to present to the engineering profession a comprehensive work which is indeed a compendium of modern practice of planning, design, construction, operation and maintenance of barrages in sufficient detail

It documents the prevalence of consumer subsidies, provides a typology of the many varients foung in the developing world

The publication discusses in detail all aspects of the rational use and protection of water resources

Mathematics often seems incomprehensible, a melee of strange symbols thrown down on a page. But while formulae, theorems, and proofs can involve highly complex concepts, the math becomes transparent when viewed as part of a bigger picture. What Is a Number? provides that picture

A narrative summary account of how water has shaped human society, from the ancient past to the present

The book includes colour plates, photographs taken by naturalists who have spent several occasions in the wilderness recording these event

Owners of exotic pets love their chimps, tigers, bears. Critics say it's dangerous and cruel

This book is about the situation on our planet. What would be if the polar ice caps melted

Ideal for today`s young investigative reader, each A True Book includes lively sidebars, a glossary and index, plus a comprehensive "To Find Out More" section listing books, organizations, and Internet sites. A staple of library collections since the 1950s, the new A True Book series is the definitive nonfiction series for elementary school readers