As someone who has read much about climate change, as well as listened to many talks on the "theory" over my decades as an Earth Scientist -- it is as you stated at this point just a "theory". The majority of those scientists that believe in the "theory" to be truth, are from 35 governmental groups. These groups are depend on their funding by governments, along with their respective university scientist. The majority of which lean heavily to the environmental activist groups side. Therefore, much of what you may read and hear in the mainstream media is bias in making the "theory" sound to the average Joe or Jane like it is fact. Ergo, 95% of climate scientists agree that the climate change is real and not still a "theory". As you say, yes polar ice is melting and sea levels are rising, but one should never under estimate our planet's ability to adapt to change over time. Only time will tell. As Tom Hanks said in the movie "Forrest Gump" "that's all I have to say about that".