I think that we do. It's pollution, carbon dioxide, and other chemicals that are even more potent, but in smaller quantities, that cause this. Look, the world's temperature is going up, weather patterns are changing, storms are getting more violent and unpredictable.
It is reasonable to at least consider it possible that these statements were made by someone that considers global warming to be a threat to the planet. 
My statement is definitely correct, because common sense implies that these statements are definitely in support of reducing climate change - but even then, I said it was only a possibility that they were, leaving room to account for an explanation that goes against common sense. I think the system had difficulty because it deals in absolutes and does not understand the current problems of our world. 
( z1 reasonable :ARG1 ( z2 consider :ARG1 ( z3 possible :ARG1 ( z4 state :ARG0 ( z5 someone :ARG0-of ( z6 consider :ARG1 ( z7 threaten :ARG0 ( z8 warm :ARG1 ( z9 globe ) ) :ARG2 ( z10 planet ) ) ) ) :ARG1 ( z11 this ) ) ) ) :mod ( z12 at-least ) )