Soil soil is the outermost layer of the lithosphere, which is naturally altered by the combined effects of water, air, and organisms. Soil has the ability to support plant growth and is the habitat of microorganisms and small animals.
3. D A Soil: EB (loam soil: containing surface layer: containing mineral substances) Source rock Compound layer: organic mixtures of organic substances: the organic component of these grades is contained in the form of biodegradable decomposition on organic modified soil. has decayed, decayed, darkened and decomposed on the nature, relative, decayed and scented minerals and structures as well as small amounts of material due to differentiation and chemicals. format. its origin disintegrates. its quality.
4. soil erosion Sand dunes and saline soils in valleys of sandy coastal areas 3% due to sloping spill of 1.5% 1.5% acid sulphate soil 1% 6.4% humus on alluvial soils high mountain other land 8.8% 0.8% 10.5% mulch yellow soil 0.7% red in the mountains 10% faded gray soil 7.4% red soil and brown gray 0.3% black soil 0.7% 28-2-2011 LAND RESOURCES
5. Environmental pollution Soil is all phenomena contaminating the soil environment by pollutants. Environmental pollution Soil, in fact due to human action, changes ecological factors beyond the tolerance of organisms. .
6. Causes: đất Soil pollution due to domestic waste  Soil pollution due to industrial waste. Pollution of land due to agricultural activities. Pollution of land due to agro-pharmaceutical.
7. Soil pollution by domestic waste:  Garbage including tree leaves, vegetables, leftovers, rags, bricks, mortar, polymers, nylon bags ....  Domestic waste water from drains to ditches and may spill into fields leading to compost and contaminating the soil. Rác The burning of waste produces toxic gases along the wind, and the ash may also contain toxins that contaminate the soil and crops.

Good morning to the Excellencies, my respected teachers and my dear friends.

The topic of my speech is Environment. Environment is the surrounding in which we live. It is the source of life. Our whole life is dependent to the environment. It directs our life and determines our proper growth and development. Good or bad quality of social life depends on the quality of our natural environment. The need of human beings for food, water, shelter and other things depends on the environment around us. There is a balanced natural cycle exists between environment and lives of human beings, plants and animals. Human society is playing vital role in degenerating the natural environment which in turn negatively affects the lives on this planet. All the human actions in this modern world directly impact the whole ecosystem.

All the actions have brought a big change in this planet which resulted in many environmental problems. Increasing demand of technologies and industries in the modern time impacts the nature. The increasing invention of new technologies has changed the interaction of people with environment which permits more population to grow. The modern technologies have immense power which has altered the whole environment in an unimagined way. The indiscriminate use of environment is the root of ecological crisis. Such continuous increase in the technologies and human behaviour are correspondingly very serious. Such amazing technologies have become the reason of economic growth in 20th century however it had dramatically affected the natural resources.

Some of the environmental problems are rapid growth in world population, deteriorating natural resources, diminishing forests and wetlands, erosion of soil and coral reefs, depleting underground water, regular shortage of fresh drinking water, vanishing plants, salinization in Africa, Asia, Latin America and Middle East. Some other issues are loss of biodiversity, rapid extinction of some important animal species, collapse of fisheries, rising air and water pollution, rise in atmospheric temperature, thinning of ozone layer, spoiling rivers, seas and underground resources.

Even though science and technology have radically altered the terms of adaptation to the nature, we still need to adapt to the environment. Human society is embedded in an environment. We must not forget that the human being is first and foremost an animal, sharing living space with other animal species in an environment on which they are mutually dependent. It is our responsibility to save our environment and earth and make the possibility of healthy and happy life here.

Thank You!