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___________ technology is technology designed to meet the needs, skill, knowledge and means of local people.
____________ is the measure of how many different species live in a particular ecosystem.
Over ___________ is when the soil is exhausted by over-cropping and overgrazing.
Hot deserts are areas that have high average temperatures and very low precipitation.
Mineral __________ is the removal of commercially valuable amounts of solid mineral resources from the earth.
________ include ores, which contain metals, such as iron; precious stones, such as diamonds; building stones, such as granite; and solid fuels, such as coal.
Appropriate __________ normally combines simple ideas with cheap, sustainable and accessible materials.
___________ is when soil is exhausted by too many livestock grazing on the land.
