Solutions of Environmental Issues from BIOLOGY TEXTBOOK FOR CLASS 12 - hr

This topic discusses the causes of air pollution and its preventive measures. It also describes the working of electrostatic precipitation along with a diagrammatic representation.

This topic discusses the causes and preventive measures of water pollution. It describes biochemical oxygen demand and eutrophication in detail. Further, it discusses a case study on integrated wastewater treatment.

This topic discusses the effects of solid wastes on the environment. It also includes a case study of remedy for plastic wastes. Solid wastes comprise everything that goes out in the trash.

The topic briefs on the uses of agrochemicals. It causes soil pollution due to alteration in the quality of soil. The importance of organic farming is explained with a case study here.

This topic discusses the hazardous nature of radioactive wastes. Though nuclear energy was hailed for the non-polluting way of electricity generation, it was realized later for its very serious inherent problems.

This topic describes the causes of greenhouse effect, gases responsible for greenhouse effect and global warming. The phenomenon due to which the temperature on the earth rises is termed as greenhouse effect.

In this topic, we shall understand the causes of ozone layer depletion in the stratosphere and its effect on earth. The ozone layer is present in the upper part of the atmosphere, which helps from the UV radiations emitted by the sun.

This topic mainly focuses on soil erosion, desertification, waterlogging and soil salinity. Resource degradation can be caused due to improper resource utilization processes.

This topic discusses the consequences of deforestation and the necessity of reforestation. Deforestation is the process in which there is a permanent removal of trees from the forest.