VANCOUVER—A local business owner’s frustrations with Vancouver’s new single-use plastic ban highlights some experts’ concerns that the well-intended green policy may actually lead to unintended environmental consequences. On Jan. 1, the City of Vancouver introduced a ban on plastic shopping bags, along with new mandates for businesses to charge consumers an extra 25 cents on disposable cups, 15 cents for paper bags, and $1 for reusable bags. The new city bylaws come less than a month after the Trudeau government published draft regulations outlining how Canada will ban similar plastic items at the national level, along with plastic cutlery, stir sticks, straws and six-pack rings, by as early as the end of this year. Zach Berman, co-founder of Vancouver-based juice company The Juice Truck, says he believes these policies haven’t been thought out practically and won’t reduce Canada’s carbon footprint nearly as much as politicians tout. His concerns are backed by …