Photosynthesis

Hold

Techniques

The biological process by which plants convert carbon dioxide and water into glucose and oxygen using light energy.

Why it's here

Placed in Hold: 1 article(s) of evidence from 1 source(s), led by research-stage coverage, with 1 in the last 30 days. Confidence 24%. Low accumulated evidence, so it defaults conservatively pending more signal.

Evidence (1)

2Hacker News·7/30/2026research
Why houseplants can’t realistically offset indoor CO₂
The article argues that while plants do absorb carbon dioxide through photosynthesis, the amount of light and energy required to offset human CO₂ output indoors is far higher than many people might expect. After accounting for photon efficiency, plant losses, and real-world lighting constraints, the setup would require extremely powerful grow lights or an impractical amount of sunlight. The piece concludes that houseplants are not a practical solution for keeping indoor CO₂ in check.