Presumably you mean high above sea level, in places like Denver, Colorado. The adjustments need to slow the yeast down as low pressure tends to make it produce gas too quickly, so it escapes before the dough bakes. Use less yeast and add some salt, and prove it for less time. You will find more advice here:http://www.creative-culinary.com/high-altitude-baking/
Baking soda will almost certainly raise the pH level in a pool.
Altitude above sea level can be calculated by measuring the air pressure and making adjustments for local high or low pressure conditions. http://en.wikipedia.org/wiki/Sea_level
the pH level of baking soda is 8.5
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Anything baked in an oven requires a different baking time when it is being baked above or below sea level (i.e due to variations in air pressure).
Yes, Portugal is above sea level.
Cincinnati is 482 feet (147 meters) above sea level
Above sea level.
Baking Soda
On the object's weight and height above the chosen reference level (for example, above ground level).On the object's weight and height above the chosen reference level (for example, above ground level).On the object's weight and height above the chosen reference level (for example, above ground level).On the object's weight and height above the chosen reference level (for example, above ground level).
It is 781 feet above sea level.
yes how much above sea level i dont know but yes it is above sea level