i (full name) of class (class with section) is here to give speech on global warming.
global warming is defined as an increase in the average temp. of the earth's surface
causes of global warming- global warming occurs as a result of the increased concentration of greenhouse gases in the atmosphere. greenhouse gases include carbon dioxide, methane and water vapour. these gases trap solar radiations released back by the earth. this helps in keeping our planet warm and thus, helps in humans survival. however, an increase in the amount of greenhouse gases can lead to an exercise increase in the earth's temp. , leading to global warming. global warming is a result of industrialisation, burning fuels and de forestation
.effects of global warming- global warming is defines as an increase in the average temp. of the earth's surface. it has been observed that in past three decades, the average temp. of the earth has increased by 0.6 degree C as a result, the natural water cycle has been disturbed resulting in changes in the pattern of rainfall. it also changes the amount of rain water. also, it results in the meaning of polar ice caps and mountain glaciers, which has caused a rise in the sea level, leading to the inudation of coastal regions.
control measures for preventing global warming-
1) reducing the use of fossil fuels
2) use of bio-fuels
3) emproving energy efficienty
4) use of renewable source of energy such as CNG, etc
6) recycling of materials