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Pollution: An Introduction

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Ms.Aruna Kumari,Lecturer DIET:Mrs.Neha Yadav,Lecturer Diet)
Pollution and introduction

Pollution

pollution is broad terms may be defined as an undiserable change in physical,chemical or biological characteristics of air,water that may or will harmful affect human lives,lives of desirable species,living conditions or will deteriorate raw material resources. Pollution are substance,chemicals or factors which cause adverse effect on natural quality of any constituent of environment.Pollution are generally bye products or waste materials.


Introduction

Pollution are substance,chemicals or factors which cause adverse effect on natural quality of any constituent of environment.Pollution are generally bye products or waste materials.


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this chapter will help us to explain different environmental problems like air pollution and water pollution

Pollution


1.2 Objectives

Explain concept of environmental problems, types of pollution

Identify and perform activities for environmental protection compaign in school and communities

Describe green house effect and global warming, their causes effects and preventive measures

Air pollution: air pollution is the addition of undesired substance in air by human activity or by natural means that the harmful to human existance.some activities are responsible like burning coal, combustion of oil, smoke from industries and stone crushers. Toxic gases and other pollutants are released in the atmosphere

causes of air pollution sources of air pollution refers to the various locations,activities or factors which are responsible for the releasing of pollution in the atmosphere.thease sources are :chemicals,dust and controlled burn practices in agriculture and forestry management.fumes from paints,hair spray,varnish aerosol sprays and other solovents.nuclear weapons,toxic gases,given warefare and rocketry.


Effect of air pollution Co2 is a green house gas and causes green house effects. Particulate matter like soot dust cause irritation of respiratory tract and diseases like asthma. Self check exercise: Write the name of green house gas? Cotton dust from industries cause asthma disease / lung fibrosis.
Self check exercise: 1)industrial gases causes lung fibrosis 2)write the name of green house gas
Water pollution: it is the degradation of quality of water due to addition of substances, chemicals that makes it unfit for human use.
Causes of water pollution: The specific contaminants leading to pollution in water include a wide specturm of chemicals,pathogens and physicals or sensory change such as released temperature and discoloration
effects of water pollution: the food chain is damaged,disease can spread via polluted water,acid rain contains sulfate particles,which can harm fish or plant life in lakes and rivers.pollutants in the water will after the overall chemistery of the water,causing change in acidity,temperature and conductivity.
Self check exercise: 1)list out two situation when we can observe polluted water 2)list out five sources of water pollution
Unit summary
Environmental problems: a)Air pollution b)Water pollution
References: Teaching of science Dep-Ssa
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