While the exponential growth of trade and travel in recent decades has broadened the country’s horizons, it's also made it much harder to control a major threat to biodiversity. It's National Invasive Species Awareness Week and Nature Conservancy spokesperson Lee Greenwood says an estimated 4,300 invasive species are in the U-S, including animals, plants, and diseases.
"Asian Carp are a huge problem to freshwater systems. A land-based invasive would be the Emerald Ash Borer, that kills all the different native species of ash trees. There’s a whole slew of different invasive grasses and flowers that can destroy grazing areas."
Before leaving office, President Barack Obama signed an executive order reaffirming the Invasive Species Council but President Trump has discussed plans for drastic cuts to the Environmental Protection Agency, which some experts say could jeopardize programs that combat invasive species.