Add spaces: Thisiseasilyachievedbyputtingequalproportionsofmaterialcontainingcarbon,suchasleavesandbushcuttings,andmaterialcontainingnitrogen,suchasgrasscuttingsandnettles,ontothecompostheap.
This is easily achieved by putting equal proportions of material containing carbon, such as leaves and bush cuttings, and material containing nitrogen, such as grass cuttings and nettles, onto the compost heap.