The effect of total pressure on properties of pure substances is of interest from more than a theoretical point of view. For example,
• solid-liquid and solidl-solidll transformations are of great practical importance in understanding phase transformations of minerals driven by the enormous pressures deep below the earth's surface.
• High pressures can accentuate the nonideal behavior of gases.
• In a more frivolous vein, because pressure on ice reduces its melting point, ice-skate blades glide on a thin film of liquid water created by the force exerted by the blade on the ice.
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Global warming is a huge problem which will significantly affect every country in the world. Many people all over the world are trying to do whatever they can to help combat the effects of global warming. One of the ways that people can fight global warming is to reduce their dependence on non-renewable energy sources like oil and petroleum based products.