New Mexico has become the latest US state to commit to sourcing 100% of its energy in a carbon-free manner by 2045.
The new targets require the state to supply half of its energy from renewables by 2030, with this figure increasing to 80% by 2040.
By just before mid-century, the state’s publicly regulated utilities must go entirely carbon-free.
It is expected to mean the 847MW San Juan Generating Station coal plant will be forced to close by 2022, with wind and solar power expected to fill in a large part of the gap.
The New Mexico Environment Department was awarded $85,774 (£66,679) to monitor air quality across the region last summer.