The infamous killer slug poses not only a threat to your garden plants or herbs, but is considered a member of a large group of invasive alien species, who can cause havoc to the ecosystem, increasing the threat of global biodiversity loss.

Journalism student Thorsten Weitling explores the killer slug threat - read his project here - and relates it to the threats from invasive species and climate change.

Mr Weitling is a student at the Danish School of Media and Journalism. In early 2009, he followed the International Semester Programme which is part of the GEJI project on journalism and environment.