In this show Topical Currents looks at invasive plants, reptiles, fish, insects and other critters in South Florida. These ecosystems remain under siege, at great cost to taxpayers. Fifty-million dollars annually is spent just to eradicate exotic weeds from fields, canals, ponds and roadsides. With no natural predators, Burmese pythons and amphibians thrive and prey on native species. Biologists say prevention is the best answer to the problem.
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