Physical properties of the water The water has a higher melting point, boiling point, and heat of vaporization than most common liquid. This fact indicates that there are strong forces of attraction between the...
The importance of the water There are no living organisms that can live without water as it is the medium through which all the vital processes take place, The water in the oceans and...
The global warming phenomenon Global warming is caused by the greenhouse effect, It is the continuous increase in the average temperature of the Earth’s near-surface air, The increase of the concentration of carbon dioxide...
The erosion of the ozone layer The ozone hole is a thinning or losing part of the ozone layer above the south pole, scientists have noticed that there was an erosion of the ozone...
