system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is it that when I am at work i feel really sleepy, but once i go home and relax I feel wide awake and cant sleep.
gpt
There may be poor ventilation in your office, which increases carbon dioxide, which makes you feel sleepy. It's a common problem in big office buildings, and it is one of the reasons why there are live plants around some offices. The building maintenance or facilities crew should be regularly testing carbon dioxide levels and adjusting the ventilation accordingly.