Помогите пожалуйста!!!Complete the text with the correct word. Fill in :

Помогите пожалуйста!!!Complete the text with the correct word. Fill in : save , energy , throw away , power , containers, landfill , breaks down.
A(n)1)............... is a deep hole in the ground. When we 2).......... our rubbish,this is often where it ends up. As this waste 3)............... , it produces a mixture of gases known as landfill gas. Scientist are trying to find ways to use it as a(n) 4) ................. source , but it is still too dangerous and harmful to us and to the Earth. Maybe one day we will be able to use this gas to 5) ................ our cars , but not yet. We should recycle all glass , plastic and metal 6)............... in the correct bins. If we do this , we will 7)................energy.