Field workers spread locally-sourced bat guano fertilizer on biodynamically grown marijuana plants at the SPARC cannabis farm in Glen Ellen, Calif. on Friday, July 14, 2017. Erich Pearson's expansive ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. Two men have died in New York after attempting to grow cannabis in bat ...

Doctors have reported two rare and fatal cases of histoplasmosis, a fungal disease linked to bat guano used as fertilizer for locally grown cannabis. Reading time 3 minutes Homegrown weed lovers ...

Forbes contributors publish independent expert analyses and insights. I write about biodiversity and the hidden quirks of the natural world. Buried deep within caves, bats — and especially their ...