Ecomedia Letter: d

Deconstruction (building)

Taking apart a building as much as possible, to reuse and recycle as many parts as possible instead of just demolition where all parts are knocked down and dealt with in the same manner. It also aims to separate waste for better waste management.


The worldwide trend of cutting down forests faster than they can be replaced. Deforestation is done for the tress or for the land. It creates habitat loss, threatens biodiversity, disturbs the water and carbon cycle, and increases the effect of global warming. The soil left form deforestation is often unsuitable for agriculture after a few years.

Demand Water Heater

AKA Instantaneous Water Heater. A water heater that heats water as you need it, it is a more energy efficient alternative to a heater using a tank. They should only be turned on when needed to avoid wasted energy.


When landscapes undergo a drastic change into a desert landscape, due to changes in land use, rainfall and vegetation. Human causes of this include overgrazing, deforestation and insufficient irrigation. It can also cause dust and sand storms for areas hundreds or thousands of kilometers away such as those that have occurred in Beijing over the last few decades.


Super nasty pollutants that have a severe effect on living things and have the potential to be toxic. They can become more potent as they move through the food chain and build up in the fatty tissue of animals. To mammals they are particularly dangerous as they can end up in very high and concentrated amounts in the milk mother animals feed their babies.


The taking apart of products to recycle or reuse some or all of the parts.


Do It Yourself. Usually refers to household projects such as fixing things, renovations or installations.


The process of recycling a material into a product of lower quality or usability. For example a glass bottle into ingredients for asphalt road covering.


A prolonged time of less than normal amount of precipitation (rain, snow or sleet).

Dual Flush Toilet

Toilets with two buttons on the top, one button flushes less water and the other flushes more to be used at the users' discretion according to needs. It also means a lot of water saved and they are common in places where water shortages are a big issue, such as Australia.

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