rainwater harvesting, definition of

Carbon is the chemical element with symbol C and atomic number 6. As a member of group 14 on the periodic table, it is nonmetallic and tetravalent—making four electrons available to form covalent chemical bonds. There are three naturally occurring isotopes, with 12C and 13C being stable, while 14C is radioactive, decaying with a half-life of about 5730 years. Carbon is one of the few elements known since antiquity. The name "carbon" comes from Latin language carbo, coal.

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• Choosing a water tank
  Water tanks, they come in so many different sizes and forms, it is often hard to work out what to choose and why, we can help..
• New Rainwater harvesting calculator
  This new calculator allows you to work out the practical tank size given average per month rainfall, your roof area and expected monthly water usage.

• Rainwater Harvesting Calculator
  Works out what your expected rainfall capture should be over a given year, along with your minimal tank size to have constant water given an average monthly demand. Can take monthly rainfall figures from BOM site direct.

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