louise hosie, bbc news.lion people. the world health organization says governments and the food industry need to support efforts to reduce obesity, particularly in young people. in the uk, obesity rates have doubled in the past 30 years. 0ur reporter, imogen faulkes has more. all over the world we're getting larger. the authors of this study say they are shocked by how fast obesity levels have risen since 1990. and they're urging governments to get serious about a health problem linked to heart disease, diabetes and some forms of cancer. so how did they measure us? by looking at our bmi or body mass index, which is calculated using a person's height and weight to work out whether they're under or overweight. the data showed that childhood and teenage obesity had more than quadrupled from 31 million in 1990 to almost 160 million in 2022. among adults, almost 880 million were obese in 2022, four and a half times as many as in 1990. that's more than a billion people now classed as obese. asia and the caribbean