Question

What is environmental science ? discuss the relationship between man and environment?

Answer 1

Environmental science is defined as a branch of biology focused on the study of the relationships of the natural world and the relationships between organisms and their environments. An example of environmental science is the study of the natural world and how it relates to recycling and mulching.


Man cannot be considered in isolation from his environment. Over the world, the needs of people still differ enormously.At one time the environmental problems debated in international organizations would predominantly have been those recognized by the developed countries—the need to control pollution and the desirability of conserving samples of the ecological and genetic richness and the natural beauty of the earth.

Since the United Nations Conference of the Human Environment, however, it has been increasingly realized that environmental issues are also of vital concern to developing countries and that over much of the world the environ-mental problems are still those associated with poverty—poor housing, bad public health, malnutrition and inadequate employment.

Both the creation and the recognition of environmental problems depend closely on the way society is organised and on its values and objectives. Changes on the relationship between man and his physical environment depend to a large degree on changes in the organisation and aims of society.

If man is to escape from a situation in which much energy and resources are devoted to correcting part mistakes, his aim must be to build a society which is intrinsically. The net effect of these changes, particularly during the second half of the twentieth century, was an increase in exposure to many hazards and increased potential for catastrophic losses. More than 1.4 million people have died as a result of natural disasters over the past 50 years, with earthquakes by far the biggest killers.Hazards can cause major financial problems, as well as killing many people and damaging such property. In 1998, for example, financial losses from natural disasters worldwide were greater than US$ 93 billion.

Analysis of recent trends shows significant regional disparities in losses, particularly between developed and developing regions. Financial losses associated with natural hazards are highest among the developed countries, such as the USA, where natural hazard losses exceed those of many other national social problems, including fire and crime.

In the developing world, in contrast, the costs are largely measured in terms of human suffering and hardship. Many low-income populations are forced to occupy illegal settlements on low-lying lands, steep hillsides, floodplains or other hazard-prone areas.

They are very vulnerable to significant health risks from flooding, landslides, mud slides and other natural hazards, and their dwellings and infrastructure are subject to accidents, massive damage and collapse

Answer 2

Answer:

lithosphere is the rigid, outermost shell of a terrestrial-type planet or natural satellite. On Earth, it is composed of the crust and the portion of the upper mantle that behaves elastically on time scales of thousands of years or greater.