Appropriate technology is sustainable development that follows four main rules: it must be affordable for the people involved, sustainable with little environmental impact and long-term use, use local technology and expertise whenever possible, and be what the people need while allowing local people to run it with little outside help. Examples include hand pumps for water that are inexpensive, durable, and environmentally friendly, as well as sickles for harvesting that utilize existing local skills.

1. Appropriate Technology... *Appropriate technology is an aspect of sustainable development* Appropriate technology projects follow four main rules…

2. Affordable... *The initial cost and any maintenance and parts must be cheap enough for the people involved* For example, this piece of machinery is too expensive for use in an LEDC. More relative equipment for use in an LEDC.

3. Sustainable... *It must provide long term use for the people with very little impact on the environment* The water pumps used here are worked by hand so are friendly to the environment. Also they don’t need much maintenance so last for a long time.

4. Right for the place... *Local technology and expertise should be used whenever possible* A sickle, used for harvesting grain, is a well known tool by the locals and their expertise with the tool make it appropriate for the area. As well as these examples, for a case study see House construction in Arizona, USA, using straw bales.

5. Right for the people... *The project should be what the people need. It also should be run by local people with very little outside help* The solar cooker is easy to use so expertise are not really needed and locals can operate them easily.