Speaking of !SoCal, the #SGV hills where we used to ride our bikes or run around (above a closed-down landfill that belched smoke and vomited a thick, yellow-gray liquid) are now home to a resort hotel and golf range. https://www.pacificpalmsresort.com/ and https://ihgolfclub.com/

(The regular exposure to what I assume are carcinogens and toxins is why I never expected to live beyond about half my current age.)

I don’t know whether the current resort utilizes the gasses as a power source, but the original resort did.