Variant 9. Section 2. Part 2

1. Denim clothes can be worn / bought anywhere.
2. A lot of water / oil is needed for the cotton plants.
3. Dangerous / Environmentally friendly chemicals are used to colour denim material.
4. A pair of jeans must be washed just once / many times before it is sold.
5. New techniques are being researched to make jeans cheaper / greener.