Saint Paul, Minnesota has set an ambitious goal to reduce its carbon footprint by making all public buildings carbon neutral by 2030 and all private buildings carbon neutral by 2050, as first reported by Twin Cities Pioneer Press.

St. Paul officials found that 52 percent of all carbon emissions were related to structures and the energy needed to power, heat, and cool buildings, according to Pioneer Press. Another 37 percent derived from transportation-related emissions.

In an effort to encourage a reduction in a building’s carbon footprint, St. Paul has created a competition for private building owners called “Race to Reduce”. Participants monitor and compare their energy use to comparable structures across the city. The city council also recently approved a resolution that outlines general goals such as inspiring a culture of energy stewardship, working with major institutions such as colleges to set energy goals that align with the city, and promoting efficiency in large buildings.

Another key aspect is lowering the energy burden on low-income households, ensuring that no household spends more than four percent of its income on energy costs, said Russ Stark, St. Paul’s chief resilience officer, to Pioneer Press. Small changes such as switching off air conditioning at night, as well as buying more renewably-sourced energy from community solar gardens, will help the city achieve its goal.

Under the Trump administration and its decision to pull out of the Paris Climate Agreement, cities around the U.S. have been setting their own clean energy goals and emission reduction projections. St. Paul joins cities like Seattle and Boston, which have both declared a goal of becoming carbon neutral by 2050. Former New York City Mayor Michael Bloomberg has pledged $4.5 million to help cover the U.S.’s commitment to the Paris climate agreement.