Energy & Environment



The Selwyn District landscape has changed significantly over the last two centuries. Native forests have been cleared and wetlands have been drained to make way for farming and housing. Exotic weeds and pests have been introduced that kill our native species. As a result, a large proportion of the habitat for many bird, lizard and invertebrate species has been destroyed and has resulted in numerous species becoming locally or completely extinct. Although extinct species such as moa can not be brought back, other species such as tui and kereru for example can be encouraged back to urban areas with sufficient native planting. Areas around Canterbury including Christchurch and Lincoln have seen an increase in bellbird numbers primarily because of the ecological restoration initiatives by many groups. Every little native patch helps – the combined efforts of backyard, roadside and farm plantings of natives provide food and corridors for our wildlife.

Our local streams and waterways have become polluted, particularly with nitrates, phosphates and coliform bacteria mostly because of run off from built up areas and local farms.

What Lincoln Envirotown does:

• Provides information on website of suitable native species to plant in the Selwyn District. The information is also available as a booklet from the Lincoln Library for a donation of $2.00 to cover printing.

• Local planting projects: Mahoe Reserve & corner of Ellesmere Junction Rd/Springs Rd roundabout.

• Community water quality testing of the local Liffey stream to raise awareness with the help of Water Watch (results on our web site). We also have run Liffey “clean-up” days and encourage teachers to take their classes to the stream for water testing and other educational activities.

Links: (Water Watch)

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Energy issues are an important aspect of sustainability, with the twin problems of the prospect of oil running out and the very pressing looming crisis of the effects of climate change .

What Lincoln Envirotown does:

• We have provided information in the form of an “Energy blitz” expo and two energy homes bus tours.

• Lincoln Envirotown is investigating the feasibility of alternative energy options such as windpower and solar power for homes in the Lincoln area. We are looking at what options are available, and comparing the costs. We are aiming to prepare a document that will assist in the decision making process for those interested in alternative energy. We will be producing a table summarising our findings, so watch this space.

If you are interested in renewable energy options, we have a bank of information, so give us a call. We'd love to hear about what you are doing.

Links: How to reduce your carbon footprint, how to save on your energy bill, how to save on vehicle fuel, information on what grants are available and many other things. Poorly designed and implemented street lighting cost councils from 30 per cent to 50 per cent of their emissions. What can we do?

Site of locals Robin and Steph and their wind turbine

Wind Turbines (USA site) (Jaycar electronics – has a very cheap wind turbine) How Energy3 can help you assess your wind resources and develop a wind farm

Solar Action is the New Zealand Renewable Energy Society. Solar Action promotes sustainable use of energy, including reducing the need for energy. Solar Action was founded as a volunteer society in Wellington in 1979.

  Information on the efficiency of various lamp types:
 Incandescent Candle
  40 W tungsten incandescent
  60 W tungsten incandescent
  100 W tungsten incandescent
  Glass halogen
  Quartz halogen
  Tungsten halogen
18 - 25
2.6% - 3.6%
  High temperature incandescent
Flourescent 13 W twin-tube fluorescent
  28 W fluorescent tube (T5)
  Compact fluorescent
45 - 70
6.6% - 10.3%
Light-emitting diode white LED (low power)
15 - 42
2.2% - 6.2%
  white LED (high power)
26 - 114
3.8% - 16.8%
  white LED (prototypes)
up to 150
up to 22%
Arc lamp Xenon arc lamp
30 - 150
4.4% - 22%
  Mercury-xenon arc lamp
50 - 55
7.3% - 8%
Ideal radiators Ideal black-body radiator at 4000 K
  Ideal black-body radiator at 7000 K
  Ideal white light source
  Monochromatic 556 nm source
A candle typically produces about 12.6 lumens of visible light and 40 watts of heat, although this can vary depending primarily on the characteristics of the candle wick. For comparison, note that a 40 watt incandescent light bulb produces approximately 500 lumens for the same amount of power. The unit candela was originally defined to indicate the 'brightness' of a naked candle flame.