Rainbow

It is rare to spot a rainbow in Singapore. I wonder why? Is it becoz our skies are polluted or due to the abundance of high rise buildings here? The last rainbow I spotted in Singapore was the largest one I ever saw in my life. I saw it over Choa Chu Kang Way in 2006 when I was in a taxi on my way to report for my reservist. It was so huge that it took up most of the sky. I couldn't take a pic becoz of the Army's policy against bringing in mobile phones with cameras. Grrrrrrrrrrrr.