keyword

do humans breathe in carbon dioxide

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

$ curl "https://app.seodata.dev/v1/keyword?q=do+humans+breathe+in+carbon+dioxide&country=us" +--------------+------------------+ | volume | 110 | | cpc | $0 | | competition | 0 | | country | US | | updated | 2026-05-16 | +--------------+------------------+

# related keywords

Keywords with overlapping search results, ranked by SERP similarity.

keyword	volume	cpc	overlap
do humans breathe out carbon dioxide	480	$0	12/20
do we exhale carbon dioxide	320	$0	12/20
humans breathe out carbon dioxide	110	$0	12/20
do humans breathe out co2	70	$0	12/20
can humans breathe carbon dioxide	50	$0	14/20
do humans exhale co2	50	$0	12/20
humans exhale co2	50	$0	12/20
do we breathe co2	40	$0	12/20
why do humans breathe out carbon dioxide	30	$0	14/20
breathe out co2	30	$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=do+humans+breathe+in+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