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Question		Answer
2 korzyści twardej wody start learning		2 benefits of hard water calcium ions are good for healthy bones and teeth, magnesium ions are good for reduce the risk of heart disease.
jak działa kolumna jonowymienna start learning		how the ion exchange column works ions exchange column have a lot of sodium and hydrogen ions which they exchange for calcium and magnesium ions, removing them from water.
kamień start learning		a scale
twardość start learning		hardness
jak zniwelowac kwasne deszcze start learning		how to neutralize acid rain use biofuels, use public transport, using filters in power station chimneys to remove sulfur dioxide from emissions

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