Hill: Conservative backlash spread on social media after the 2016 Rio Summer Olympics' opening ceremony featured a warning about climate change.
The primetime spectacle started with a young boy with a Pau-Brasil tree in the center of the stadium, a rare tree on on the list of Brazils endangered plants.
A video then showed a dramatic depiction of Earth and several major cities affected by rising water levels as Antarctic ice sheets rapidly melt.
While some were happy the Olympics used its global...