1.what is the occasion in the picture A and B.?
2,,what are the changes shown in each picture.?
3 is it useful or harmful to the environment ?
4.in what way it is useful to the environment ?
5.in what way it is harmful to the environment?.


1what Is The Occasion In The Picture A And B 2what Are The Changes Shown In Each Picture 3 Is It Useful Or Harmful To The Environment 4in What Way It Is Useful class=