The World Council of Churches is an evil, pro-abortion organization ~ why is the Catholic Church associated with it?

The World Council of Churches has released a paper on so-called "climate change". 

Dear, oh dear. As if we needed to know! But we do need to know something, far, far more sinister and evil. The WCC greatest claim to evil fame, is its demonic support for abortion. 

Why does the Catholic Church associate with this wicked organization? A question, that deserves an answer!