There is increasing evidence that the level of carbon dioxide in the Earth’s atmosphere is rising. There is also evidence that humans are responsible for this rise.
There is more carbon dioxide in the Earth's atmosphere because:
Greenhouse gases (like carbon dioxide) form a blanket around the Earth’s atmosphere.
This ‘greenhouse blanket’ allows heat from the Sun to enter the atmosphere but then traps it.
This is causing the Earth’s temperature to increase and is known as global warming.
Many politicians and members of the public have only recently accepted that the increase in atmospheric carbon dioxide is to blame for global warming.
Melting polar ice caps