If the gifts are deductible, the actual cost of the donation is reduced by your tax savings. For example, if you are in the 33% tax bracket, the actual cost of a $100 donation is only $67 ($100 less the $33 tax savings). As your income tax bracket increases, the real cost of your charitable gift decreases, making contributions more attractive for those in higher brackets.
Small particles of dust and pollution in the air can contribute to (and sometimes even enhance) these colors, but the primary cause of a blue sky and orange/red sunsets or sunrises is scattering by the gas molecules that make up our atmosphere.
Source(s): Theories: 1.Doppler Effect: light that is emitted by something moving away from us appear more red, and light emitted by something moving towards us appear more blue. 2.The brightness and color of a star depend on its surface temperature, which in turn depends on its mass.tars emit colors of many different wavelengths, but the wavelength of light where a star's emission is concentrated is related to the star's temperature-the hotter the star, the more blue it is; the cooler the star, the more red it is.