The state's environmental watchdog says Ireland is only on course to cut emissions by 29% by 2030.
Projections Environmental Protection Agency show Ireland will miss the 51% greenhouse gas emissions target.
The EPA says more steps are needed in the short term, if Ireland is to meet targets set for the end of the decade.
Programme Director with the EPA, Mary Frances Rochford, says the agriculture, electricity and transport sectors are among those expected to fall short on targets:
"And what we're seeing is that almost all sectors are on a pathway to exceed their national emission ceilings for 2025 and 2030.
"And that includes agriculture, electricity, transport, and industry."