Brief
Irrigation's greenhouse gas benefits far outweigh emissions costs, study finds
A new study from Colorado State University finds that irrigating U.S. crops prevents higher greenhouse gas emissions by avoiding land conversion. According to a brief report, if irrigation were suddenly shut off, the land-use change required to make up for lost yields would produce 363 times more emissions than irrigation emits.
The study from Colorado State University says that irrigating U.S. crops prevents higher greenhouse gas emissions by avoiding land conversion. Agricultural irrigation allows the U.S. to grow more food on less land. If irrigation were suddenly shut off, the land-use change required to make up for lost yields would produce significantly more greenhouse gas emissions than irrigation emits—363 times more.
Our reading is that the finding highlights land conversion as a major climate factor. The 363-times figure is a single study's estimate, not a consensus.
Our reading
Our reading is that this finding suggests irrigation's climate benefit is primarily about land sparing, but it rests on a single study's estimate.
What to do or watch
Watch for follow-up studies or syntheses that test whether the 363-times land-sparing estimate holds beyond this single Colorado State University analysis, since the article notes it is not a consensus. The unresolved question is how much irrigation’s climate benefit depends on avoided land conversion versus its own emissions across different U.S. crops and regions.
Source details and supporting facts
Each line is stated by the page named above it.
Stated by phys.org
- Irrigating U.S. crops prevents higher greenhouse gas emissions by avoiding land conversion, new research by Colorado State University shows.
- Agricultural irrigation allows the United States to grow more food on less land.
- If irrigation were suddenly shut off, the land-use change required to make up for lost yields would produce significantly more greenhouse gas emissions than irrigation emits—363 times more.
Sources
- Phys.orgText stored 15 September 2026
How this story was checked. Written from the 1 page listed above, stored 15 September 2026; claims checked against that stored text on 15 September 2026.
What that means
- 3 of 3 reported statements were confirmed against the page that carries them; the rest were removed rather than published.
- Figures in the text were required to appear in the stored source text: yes. Identifiers: yes.
- The check reads stored text only: no claim rests on a fresh look that did not happen.
- Where the reporting was silent, the text says so instead of filling the gap.