(CNN) — Lake Naivasha, northwest of Nairobi, Kenya is becoming increasingly unnavigable. Water hyacinth, the world’s most widespread invasive species, is blanketing the lake, choking its fish and ...

Three-cornered Leek is in full flower at present and it is easy to spot as it often grows in dense clumps along roadside verges and banks where it is unmistakable to passing road users. The plant is ...

An international research team led by the University of Vienna has produced, for the first time, high-resolution global maps of invasion risk for thousands of alien plant species under current ...