This article is by Richard A. Kerr (2007) and was published in the journal Science and a link to the full pdf is provided below. It is an article that is accessible to a larger audience than just scientists and provides a good overview of recent work from the Intergovernmental Panel on Climate Change (IPCC) and discusses the role of human activity and some of the projected consequences of climate change.
1. Have students provide brief oral reports on which of the IPCC’s projected impacts (page 189) might already be occurring (e.g. Small Island Nations and rising sea levels).