1.   However, both these methods would be greatly improved by adding full-length curtains at the sides where space allows.

2.   The situation is improved by adding velvet curtains, acoustic tiles and a thick pile carpet.

3.   Later this design was improved by adding a third wire alongside the hot and neutral wires.

4.   Soils can be improved by adding well-rotted organic matter or manure, granulated peat and coarse sand for healthy plant growth.