Blue Ridge landfill site in Texas is trying to capture methane from mountains of rubbish and has the potential to reduce annual greenhouse gas emissions equivalent to more than 51,000 cars on local roads.
A growing number of young Indonesians are feeling "eco-anxiety". But they're channelling that panic into practical actions to tackle pollution and educate the next generation.
This year, governments and guiding companies are promising to do more to keep the mountain clean, but the question of what to do with the dead bodies is becoming more urgent.
