Why are there different theories about the effects of global warming?
AThere is no data to support global warming.
BGlobal climate is complex, so changes in global climate are hard to predict.
CIncreased levels of carbon dioxide are offset by other changes.
DThere has been a decrease of extreme weather.
AThere is no data to support global warming.
BGlobal climate is complex, so changes in global climate are hard to predict.
CIncreased levels of carbon dioxide are offset by other changes.
DThere has been a decrease of extreme weather.