Why the debate on climate change?

To the editor:

I am not an authority on climate change. I defer to those smarter than I who study the issue full time. According to NASA, “Ninety-seven percent of climate scientists agree that climate-warming trends over the past century are very likely due to human activities, and most of the leading scientific organizations worldwide have issued public statements endorsing this position.” (climate.nasa.gov/scientific-consensus/)

I know this is a “heated” topic but I am not sure why.

Justin Vorbach