This is a lesson to cover 6.3a and b for those students studying GCE Geography Carbon and Energy Security. Written for the Edexcel course but also applicable to other exam boards. Students look at both the wider importance of the carbon cycle as well as considering how we, as humans, have enhanced the greenhouse effect. Student handouts are contained as slides within the presentation and there is a homework task also. The lesson will require access to ICT facilities for a research task into greenhouse gases or for the information to be printed off from the website link contained within the presentation.