The United Nations declared 2010 as the International Year of Biodiversity, and in early June Green Week 2010, the largest annual conference on European environmental policy turned the spotlight on this difficult issue.
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Philip Hulme, Professor of Plant Biosecurity at the Bio-Protection Research Centre, was an invited speaker at Green Week 2010, contributing to a session on Invasive Species, which, he explains, are considered the second biggest threat to biodiversity on a global level, after habitat destruction and deterioration.
"Invasive species are those that have been