Polarity and Boiling Point: The polarity of the molecules determines the forces of attraction between the molecules in the liquid state. Polar molecules are attracted by the opposite charge effect (the positive end of one molecule is attracted to the negative end of another molecule.
The five disadvantages of solar power. It's intermittent. Solar energy is only available when the sun is shining. It's low efficiency. It requires large areas of land. It's not completely free of environmental impact. Ultrapure polysilicon is now scarce. It's high cost.
Solar farms offer incredible benefits, but do have some environmental impact. Solar energy has the potential to dramatically change the way the world gets its power. Enough solar energy falls on a 100-square-mile area of the southwestern United States to power the entire nation (See Reference 1).olar power is sometimes described as a zero emissions or emissions-free form of energy, and it is true that greenhouse gas emissions from solar are negligible (See References 1). However, the construction of new utility scale solar energy projects is bound to result in some greenhouse gas emissions.