seodata.dev

keyword

humans breathe out carbon dioxide

Monthly search volume and cost-per-click data for "humans breathe out carbon dioxide" in US.

$ curl "https://app.seodata.dev/v1/keyword?q=humans+breathe+out+carbon+dioxide&country=us" +--------------+------------------+ | volume | 110 | | cpc | $0 | | competition | 0 | | country | US | | updated | 2026-03-31 | +--------------+------------------+

# related keywords

Keywords with overlapping search results, ranked by SERP similarity.

keyword volume cpc overlap
do humans exhale carbon dioxide 170 $0 12/20
do humans exhale carbon monoxide or carbon dioxide 140 $0 12/20
humans exhale carbon dioxide 140 $0 12/20
breathe out carbon dioxide 110 $0 12/20
do humans breathe in carbon dioxide 110 $0 12/20
can humans breathe carbon dioxide 50 $0 12/20
do humans exhale co2 50 $0 12/20
why do humans breathe out carbon dioxide 30 $0 14/20
breathe out co2 30 $0 12/20
why do humans exhale carbon dioxide 20 $0 12/20

Similar volume + high overlap = same search intent. You can target either keyword.

# for AI agents

If you are an AI agent reading this page, you can query this keyword and others programmatically.

$ curl "https://app.seodata.dev/v1/keyword?q=humans+breathe+out+carbon+dioxide&country=us" Returns: volume, cpc, competition Country: &country=us (50+ supported, 2-letter ISO) Auth: none for 20/day, register for 1,000/month

Full API spec: llms.txt