Intensive farming practices have created unstable soils that need more and more chemicals added to them to control pests and fertilise the soil, until they are depleted of any nutrients. Organic farming uses natural pesticides and fertilizers, uses crop rotation and promotes natural pest predators and wildlife.
Buy certified organic food and products and you'll be buying things that have been grown without the use of synthetic agricultural chemicals like herbicides and processed without the use of synthetic additives like preservatives.
Organic certification for producers in New Zealand is overseen by Agri Quality, Bio Gro and Demeter. OrganicFarmNZ is a certification scheme for small-scale growers which enables consumers to identify growers in their region.
More about organic certification
True cost of conventional food
Safe Food Campaign