Nylon is a man-made fibre, the use of which has helped more people to have cheaper and more colourful clothes to wear.

There was no food in the refrigerator, so she had to visit the grocery store to ________ their supply.

It turned out to be a_______ journey when the weather became bad.

_______is wiping out many kinds of plants and animals.

The tiger is_______ of extinction.

If we continue to deplete our planets natural resources, we will damage the environment significantly.

The council wants to ____ the character of the city while reconstructing the Old Quarter.

You can ______ the air with a filtration system.

I never leave any electrical appliances on standby and I think it is a good way to _____ energy in the home.

Nowadays, people are searching for more ____ materials to build their houses.

Water _______ is essential during the summer months.

Solar technology has also emerged for the clean and renewable production of hydrogen as an alternative energy source.

The humanitarian organization wanted to launch a _____ on gender equality in villages in Northern India.

Construction projects have resulted in soil ______ and water pollution.

Sulphur dioxide is one of several _____ that are released into the atmosphere by coal-fired power stations

Hydropower is a vital source of ______ energy for many countries and Vietnam is no exception.

They have caused serious water pollution by dumping industrial ______ into the lake

It's our duty to______the planet for future generations.