Complex sentence: Environmental organizations, many governmental reports, and the non- U.S. media agree on this virtually unanimous scientific opinion on climate change substantiating human-caused global warming, although there is less agreement on the specific consequences of this warming.
Split into simpler sentences: Environmental organizations, many governmental reports, and the non- U.S. media agree with the virtually unanimous scientific opinion on climate change substantiating human-caused global warming. There is less agreement on the specific consequences of this warming.