The growth of takeout food deliveries provides customer convenience, but also poses an eco-threat, as Zheng Jinran reports.

On workdays, Ma Rong, a 25-year-old white-collar worker in Beijing, usually orders takeout at lunchtime, especially on hot summer days, to avoid crowded restaurants and save time.

"We don't have a canteen or time to cook when working, so we have to rely on takeout," she said.