The State of New Zealand's Environment, 1997

agricultural air pollution air quality animals aquifers areas atmosphere Auckland Auckland Regional Council average Bay of Plenty biodiversity Canterbury carbon dioxide catchment CFCs chemicals Christchurch Climate Change coastal concentrations contamination Crown Research Institutes cumecs depletion discharges economic ecosystems electricity emissions energy Environment environmental erosion farms fertiliser Figure fish Fisheries flood flows forest forestry fuel geothermal global greenhouse gases groundwater guidelines Health hectares human impacts increased indigenous industrial lakes land landfills levels Maori marine measures metres million hectares Ministry monitoring Montreal Protocol natural nitrogen North Island nutrient OECD oxide oxygen ozone layer ozone-depleting pasture percent pesticides pests petrol plants population pressures production programmes protection radiation rainfall Regional Council Research Resource Management Act rivers sediment sewage soil sources South species Statistics New Zealand stormwater sulphur survey sustainable Taranaki temperature tonnes tussock urban vegetation vehicles Waikato waste water quality Wellington wetlands Whangarei µg/m³