ohh goodness, I stopped reading after the first 4 names on the list. In other news, I heard that Whitney Houston's daughter died recently - hence proved that if you're a singer, your children will also die earlier, Q.E.D.
In all seriousness, you begun with "I love singing..". Don't think about CO2 no more and continue doing what you love. Not doing what you love will probably have more serious repercussions !