But after a decade, she saw more rubbish than colourful fish underwater so started to feel anxious.
"I found so much plastic waste, mainly from single-use plastics such as packaging and straws," she said. Ms Lestari, an environmental engineer, decided to tackle the pollution problem so founded Divers Clean Action six years ago. Now, the organisation has more than 1,000 volunteers across Indonesia.
Before the pandemic, the group dived to pick up waste from the ocean, but with more people shopping online because of COVID-19, Ms Lestari now also runs a campaign to eliminate plastic bags and packaging. Ms Lestari, who was on Forbes' 30 Under 30 Social Entrepreneur list last year, said she was one of a growing number of young Indonesians who have felt "eco-anxiety".
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