Minneapolis explores carbon credits to help reforest the city The city seeks alternatives as a property tax levy to replace its canopy is set to expire at the end of the year May 6, 2021 — 2:29pm Text size Copy shortlink: A divided Minneapolis Park Board voted to work with the nonprofit group Green Minneapolis to create the Twin Cities' first tree-planting carbon-offset credit program. Minneapolis loses about 3,000 trees a year to increasingly destructive storms and invasive pests such as the emerald ash borer. At the same time, the city's Tree Preservation and Restoration Levy, which raised $11.35 million from property taxes over the past eight years to replace some 40,000 trees, is due to expire at the end of this year.