Scientists believe the (– – – ) is responsible for various natural events.

In my town, the water ( – – – ) is very high, and water will appear in even a small hole.

The Mediterranean is badly (– – – ) in some areas by sewage pollution.

Deforestation has increased ( – – – ) seriously in Brazil.

( – – – ) has endangered many species throughout the world.

In most countries, (– – – ) rubbish is a criminal offence.

In my country, we use ( – – – ) from cotton manufacture for lighting fires.

My family have a well which connects to a /an( – – – ), giving very pure water

Water ( – – –) might be a solution to water shortages in very hot countries.

Surprisingly, Britain still sends most of its domestic waste to (– – – ).

Surprisingly, Britain still sends most of its domestic waste to ( – – – ).

My brother has a waste ( – – – ) company, which is subsidised by the local authority.

Elephant ( – – – ) should be a much higher priority for the world authorities, as elephants are an endangered species.

The food ( – – – ) has been disrupted by the loss of certain species, with widespread impacts on all animals.

Logging has caused substantial ( – – – ) for wildlife in many countries.

The community has (– – – ) to a tenth of its formal size in the last few years.

Famine in Africa has been (– – – ) by civil war and political instability.

The atmosphere in large cities is often (– – – ) by smog, as we can see in China.

Children should be educated on the ( – – – ) through field trips and practical experiments.

Scientists spend their whole careers studying the effect of ( – – – ) on the climate.

I remember going to a factory and seeing the snow covered with (– – – ) particles.

Dinosaur (– – – ) may have been caused by a meteor or volcano, but scientists seem unsure about this.

Many singers help make charity songs to raise funds for ( – – – ) relief.

( – – –) in central Africa can continue for many years, apparently.

If we want quick solutions to famine, better ( – – –) and farming methods would probably be the first step.

The continuing destruction of the rain forests is a ( – – – ) for the global biosphere.