(Note that this article was in the New York Times, so Buffett was certainly aware of it and would have demanded a retraction if he felt they misconstrued his position).
Moreover, Buffett has given BILLIONS MORE to the Bill and Melinda Gates Foundation and the Gates foundation spends billions on population control world wide.
Say whatever you want, but Buffett's money is funding abortion.
References? The Gates foundation strove to keep its nose clean from abortion. Bill Gates did not want Microsoft to be hurt by this inflammatory issue.
Contraceptives were a different story.