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.
Increased levels of pollution change the composition of our atmosphere and add more particulate matter to the atmosphere, which will cause a different shift in the hue of sunsets. If you find a more ruddy reddish brown sunset to be beautiful, then the answer to your question is yes.
Because red light also scatters if there is enough air between the source and the observer, these longer wavelengths of light will also scatter significantly, making parts of the sky change color during a sunset. As the amount of atmosphere nears infinity, the scattered light appears whiter and whiter.