two questions of three marks from natural resources chapter
Answers
Q1 What are fossil fuels explain with examples
Q2 How are CFCs harmful for atmosphere
fossil fuels are made up of Dead plants and animals buried under the ground millions of years ago
chlorofluorocarbons can cause ozone depletion
ozone depletion is mainly caused by cfcs used in refrigerants and solvents used in industries these substances are non inflammable and inexpensive to produce cscs do not break down in the atmosphere or come back to the earth as rain this load up into the atmosphere with the help of winds and warm air currents. deadlift of word into a slowly sometimes taking many years to reach the stratosphere. inter status fear the ultraviolet rays from the sun breaks them apart and releases chlorine atoms. combines with oxygen atoms to form chloride mono oxide which causes a chemical reaction that destroys Ozone molecule in the stratosphere and and Ozone hole is gradually formed. the chlorine from the chlorofluorocarbons of the products we use eventually lead to the depletion of Ozone in the stratosphere.
forest help to reduce the amount of pollutants in the eighth grade exchange deforestation of cutting down of trees and forest on a large scale greatly increases the risk of carbon monoxide reaching the atmosphere and resulting in the depletion of the Ozone layer which Turn in result in global warming . burning of harmful fossil fuels causes ozone depletion vehicles that run run on petroleum release carbon dioxide into the air. carbon dioxide emissions and other greenhouse gases destroy the Ozone layer in the atmosphere by breaking up the molecules and leaving it extremely vulnerable to the ultraviolet rays of the Sun. most of these greenhouse gases are found in the fossil fuel emission that can burn off and release into atmosphere. we depend on our vehicles to reach our destination everyday. this means an increase in fossil fuel emissions and greenhouse gases into the air which can leads to depletion of Ozone layer and global warming.