save water

Why drip irrigation saves wastage of water?

Why should paper be saved? Prepare a list of ways by which you can save paper.

Is is necessary to save electricity ? If so, suggest a few ways to save electricity.

Recently, there was an editorial in the newspaper about 'Rhinoceros in Kajiranga National Park'. These consume foliage in large guanitities and then move to nearby waterbodies and defarcate there. As a result, water bodies witness algal growth and are subsequently getting choked. (i) What is the possible reasons of algal growth in these water bodies ? Name the process involved. (ii) What will be the consequence of excessive choking of water bodies with algal bloom ? (iii) List atleat one step that governmet must take to save such water bodies.

A man saved ₹660000 in 20 years. In each succeeding year after the first yea he saves ₹ 2000 more than he saved in the previous year. How much did he save in the first year?