Not a fringe science but IMF https://www.imf.org/external/pubs/ft/fandd/2019/12/natures-solution-to-climate-change-chami.htm
Also IMF: https://www.imf.org/Publications/fandd/issues/2020/09/how-african-elephants-fight-climate-change-ralph-chami
Financing conservation by valuing carbon services produced by wild animals
Bats are one of the most important misunderstood animals | U.S. Fish & Wildlife Service
"Bats eat enough pests to save more than $1 billion per year in crop damage and pesticide costs in the United States corn industry alone”
Woodland natural capital accounts, UK - Office for National Statistics
“The removal of air pollution by woodland in the UK equated to a saving of £938.0 million in health costs in 2017.”