What is Medium Density Fibreboard?

[misisgreen]

Medium-density fibreboard (MDF) is a wood panel product made up of wood fibers (rather than small chips used in particle board) that have been bound together by heat, pressure and resin binders.

The wood fiber used often comes from pine plantations, but just about any wood waste can be used in its manufacture, including paper.
Antibiotics Contaminating The Environment
Recent research has found antibiotic pollution in the environment is contributing to increasingly antibiotic resistant bacteria.

An article reporting on the findings on WebMD mentions "selective pressure"; basically survival of the fittest - with the "fittest" bacteria surviving exposure to these medications passing on their antibiotic resistant attributes when they replicate.

Aside from overuse in humans and disposal issues, antibiotics are also widely utilized in agriculture. Sometimes their use is to deal with cramming so many animals so closely together, in other applications they are used to accelerate growth; a practice that will be coming to an end in the USA soon.
Refrigerator Tips - Save Cash And Reduce Environmental Impact
One of the major energy suckers in most households is the fridge. With electricity prices skyrocketing and energy efficiency an important part of green living; a kilowatt-hour shaved from our consumption here and there helps our pocket and the planet; as does reducing food waste associated with refrigerator use.

[gallot]

Is the wood expensive? Is it used on exterior walls? What kind of thermal rating would it have?