Sustainability is expressed as meeting present environmental, social, and economic needs without compromising these factors for future generations A practice cannot be said to be 'sustainable for X years/generations.' The use of any span of time disqualifies the activity. Sustainability is for perpetuity.
Sustainability also means greater efficiency in resource use, ultimately giving benefits to economic growth and overcoming poverty, as well as health and quality of life.
Sustainable design and sustainable development are critical factors to sustainable living. Sustainable design encompasses the development of appropriate technology, which is a staple of sustainable living practices. Sustainable development in turn is the use of these technologies in infrastructure. Sustainable architecture (see Green building) and agriculture are the most common examples of this practice.
. This is a technique to join wood using scrap tin, such as that from a used can. Needed materials include:
1. Two sticks of wood to be joined.
- Make sure the wood is in good condition where the connection is to be made. It should be clean, no bits of bark or loose paint, and no knots, as they are too hard for nails.
2. Two pieces of thin tin.
- For the first bond, use a knife for cutting the tin from a small can for example.
- Length and width equal to the stick diameter. (more steps follow)
Spacer for asthma medications made from a 500cc plastic bottle.