1 AS Environmental Science/Studies resources Search within results Go How ratings and recommendations work Apply Filter resourcesClear all filtersLevelClear filter AS SubjectClear filter Environmental Science/Studies Exam board All boards TopicClear filter Aerobic respiration Carbon dioxide Life on Earth Nitrogen Oxygen Photosynthesis Processes Respiration Water vapour Resources Revision Notes Processes which influence life on Earth AS, Environmental Science/Studies Revision notes Search again