Scientists and researchers try to find out where the harmful microplastics in Lake Champlain are coming from. Plus, economic challenges have forced about one third of small outdoor cannabis growers in Vermont to give up their licenses, a heat wave descending on the region today has utilities asking customers to conserve energy, state tax revenues fell well short of their predicted targets last month, Montpelier’s City Council will review its sanctuary city policies, and scientists and researchers who want to leave the US are being recruited in Montreal.