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Invasive Species Cost World 16 Billion United States Dollars

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Two invasive species, such as the American bullfrog and the tree snake with brown spots, have cost the world $15 billion from 1986 to 2020.

According to the study released on Thursday, it is producing problems that range from damage to crop plants to power interruptions.

The brown-and-green frog, also known as lithobates catesbeianus, can weigh more than 2 pounds (0.9 kilograms) and had the most impact on Europe, according to Scientific Reports.

Brown tree snake, known as biogas irregularis, has exploded in uncontrolled numbers in Pacific islands, 

Including Guam and the Marianna Islands, where US troops introduced the species during World War II, said researcher Ismael Soto.

The snakes have sometimes been so plentiful that they caused power outages by crawling on electrical equipment, he said.

This highlights the need to control investment in the spread of invasive species worldwide to avoid paying for mitigation following the invasion, the study authors said. 

"Nowadays, trading in pets is now the most popular way to acquire these species, particularly because everyone wants to purchase an exotic reptile," Soto said to journalists.

The figures were derived by aggregating the costs associated with the invasive species, as detailed in peer-reviewed studies or studies deemed high quality. 

They were mainly derived from estimates and extrapolations rather than observations from the field.