The Earth is our only source of resources, and these are limited. As the population keeps growing, recycling becomes more important. Increased levels of carbon dioxide are linked to climate change.
What is one effect of the human population increasing?
The demand for fossil fuels will go down
More waste will be made
The natural environment will change less
Sulfur dioxide is released when fossil fuels burn. What does sulfur dioxide cause?
Carbon dioxide is released when fossil fuels burn. What is the main problem caused by carbon dioxide?
It is a greenhouse gas
It makes it difficult for wild animals to breathe
It is the major cause of acid rain
Which of the following is likely to be a result of global warming?
Sea levels falling
Sea levels staying the same
Sea levels rising
Which of these is a use for water resources on Earth?
As a source of nitrogen
For growing crops
To make plastics from
Approximately how many people are alive on Earth?
What term is used for the process of cutting down large numbers of trees?
What is one effect of burying rubbish in landfill sites?
It may catch fire
It uses up oxygen in the air
Which of the following is not a greenhouse gas?
What would happen if there was no greenhouse effect on Earth?
The Earth would be too cold for life to exist
The global temperature would stay constant
The global temperature would rise very quickly