• Traditional compost: this compost is most common, it is often made by combining kitchen scraps, plant trimmings, and grass clippings (sometimes referred to as ‘green’ materials, which contain lots of nitrogen) with straw and dry leaves (referred to as ‘brown’ materials, rich in carbon). It is best to have a mix of brown and green materials as the green materials need brown in order to decompose. 
• Vermicompost: using worms to break down organic waste. They consume organic matter, and their waste becomes compost. This type of composting is best for kitchen scraps, tea bags, and coffee grounds.
• Green manure: crops such as clover and ryegrass are allowed to grow, to then be cut down and mixed into the soil. The crops provide additional nutrients for new plants to grow.
• Leaf mould: this is a form of composting where fallen leaves (which are rich in carbon) decompose and this helps moisture retention and soil structure. 
• Bokashi: this type of composting uses a specific bokashi bin, which creates compost by fermenting kitchen scraps and bokashi bran together. The fermented waste can be mixed into soil or can be further composted through other methods.

If you have a compost bin, make sure to mix the compost to add air (which is needed for the composting process), otherwise the compost will create methane, which is more than 80 times more harmful than carbon dioxide.