Democratic and environmental efforts aimed at fighting climate change and dirty air are poised to have a big impact, according to new data from the Colorado Department of Public Health and Environment. A new greenhouse gas inventory shows that climate-change causing gases in the state peaked in 2010 and are projected to decline into 2030.

“I would expect that [decline] to increase in the next 15 years as we put more policies in place to reduce emissions,” said Garry Kaufman, director of Colorado’s Air Pollution Control Division.

The Colorado Department of Public Health and Environment expects carbon dioxide, methane and other greenhouse gases to slightly decline in 2020 compared to the last inventory conducted four years ago. A more significant dip is estimated for 2030. One of the most effective new laws that could cause a greater dip in future greenhouse gas emissions is House Bill 1261, aimed at reducing greenhouse gas emissions 90 percent by 2050.