In Greenspector's 2023 measurement, TikTok (0.96 g per minute) comes first, ahead of Reddit (0.92 g), YouTube and Instagram (0.87 g); LinkedIn is the lowest (0.47 g). Across apps, the ratio is 1 to 2; across the usage times measured, from 28 minutes to 1 hour 37 minutes a day, it is 1 to 3.5 (our calculations).
Read the source article: TikTok carbon footprint: 36 to 64 gCO2e per hour of video