Local governments have programs to reduce greenhouse gas emissions which involve buying credits. These credits help offset emissions by funding projects that reduce pollution. But sometimes, it's difficult to get these projects officially recognized for credit. A study looked at different types of projects local governments do to offset carbon. They found that a lack of expertise in government staff can make it hard to get projects approved. The study came up with a solution to help governments make better decisions about which projects are eligible for credit. This decision-making tree can guide local governments in choosing the right projects to earn carbon offset credits.