We live in the age and era of science and technology. Our life has indeed been dominated by the scientific inventions and technological innovations. This world would be an absolutely poorer place without science and technology. Our charming and worth living life itself would become absolutely bleak and boring in absence of the scientific inventions and technological advancement being witnessed by us all over the globe. As a matter of fact scientific inventions, discoveries & innovations have indeed ushered in a cataclysmic revolution all over the world & in almost every field. Volumes may be spoken and written to highlight the universally acknowledged importance and usefulness of science and technology. But at the same time we and our environment are confronted with a number of challenge for our sustenance and as such we liked to write these notes very briefly so as to generate awareness among the people for the protection of our environment.For preparing this manuscript we wouldlike to thank the research scholars Samira, Humera, Nowsheen and Sana.