Hi!
Our sky is blue because air molecules will span out <em>blue </em>light from our sun more than <em>red </em>light from our sun.
If you look at the sun, you'll see orange and red colours due to the fact that the suns blue light has already been disbursed away from our line of sight.
Hopefully, this helps! =)
Answer:
Wind energy is renewable where as oil energy isn't meaning that oil will run out eventually and wind wont run out.
Older homes in older parts of Dublin would likely have more leaks. Water use is also affected by the size of gardens and lifestyle factors.