3.1.1 The process by which plants and
animals release energy for food.
Carbon dioxide=Waste product
3.2.1 Plants remove some
of the gas to make
their own food
3.3 Ocean 'reservoirs'
3.3.1 Stores of carbon, including the
atmosphere, Oceans, sedimentary
rocks and fossil fuels
3.4 Sedimentary rocks
3.5.1 When trees burn, they release carbon
dioxide into the atmosphere. Fewer trees
remain to remove carbon dioxide from the
atmosphere by photosynthesis
3.6 Combustion of fossil fuels
3.6.1 Also releases carbon dioxide into the
atmosphere. Fossil fuels contain carbon atoms
that have been locked away for millions of years.
When they are burnt, they join with oxygen atoms
and enter the atmosphere as carbon dioxide