Kid News This Week: Battle against mosquitoes, beavers are back, clean cling-film, cow-poo zapper

Kid News This Week: In humanity's battle against mosquitoes – should we swat or swap them? Also, Britain’s beavers are back, cleaner cling-film is being developed and how to make cow poo less toxic for the environment? A poo zapper, naturally. All that and more on this week’s news pool for curious kids and adults!