Climate change is affecting seasonal cycles around the world. New seasons are emerging: fog season and trash season.

Experts warn that these new seasons threaten ecosystems and have serious impacts on public health. Fog season occurs annually in Southeast Asia and degrades air quality to dangerous levels.

Trash season lasts from December to March in Bali. Monsoon winds carry large amounts of plastic waste to the shore.

Some traditional seasons are disappearing. For example, the winter sports season in the Andes and Rocky Mountains is collapsing due to a lack of snow.