| Subject | English | Latvian |
| environ. | clean air area Areas where significant reductions in ozone forming pollutants have been achieved through industrial initiatives to control and/or prevent pollution, through implementation of transportation improvement plans, national efforts to reduce automobile tailpipe emissions and lower the volatility (evaporation rate) of gasoline | tīra gaisa teritorija |
| environ. | clean air car Vehicles that function without emitting pollutants in the atmosphere | videi draudzīgs transportlīdzeklis |
| environ. | Clean Air for Europe Programme | programma "Tīru gaisu Eiropā" |
| coal. | clean coal | attīrītas akmeņogles |
| environ. | clean coal | tīras akmeņogles |
| ecol. | Clean Coal Technology | tīra akmeņogļu tehnoloģija |
| environ., UN | clean development mechanism | ekoloģiski tīras attīstības mehānisms |
| environ., UN | clean development mechanism | tīras attīstības mehānisms |
| econ. | clean development mechanism | tīrās attīstības mehānisms |
| comp., MS | clean installation | tīra instalācija (The process of installing Windows onto a bare-metal system or overwriting an existing operating system installation. Clean installations do not migrate data from previous installations) |
| transp., avia. | Clean Sky | kopuzņēmums "Clean Sky" |
| transp., avia. | Clean Sky | kopīga tehnoloģiju ierosme "Clean Sky" |
| gen. | Clean Sky | "Clean Sky" |
| transp., avia. | Clean Sky Joint Technology Initiative | kopīga tehnoloģiju ierosme "Clean Sky" |
| transp., avia. | Clean Sky Joint Undertaking | kopuzņēmums "Clean Sky" |
| gen. | Clean Sky Joint Undertaking | "Clean Sky" |
| transp., avia. | Clean Sky JTI | kopīga tehnoloģiju ierosme "Clean Sky" |
| transp., avia. | Clean Sky JU | kopuzņēmums "Clean Sky" |
| gen. | Clean Sky JU | "Clean Sky" |
| transp., avia. | Clean Sky Undertaking | kopuzņēmums "Clean Sky" |
| gen. | Clean Sky Undertaking | "Clean Sky" |
| comp., MS | clean system | tīra sistēma (An installation of Windows that has not been modified and has not had any additional software installed on it) |
| environ., tech. | clean technology | ekoloģiski tīra tehnoloģija |
| environ. | clean technology Industrial process which causes little or no pollution | tīrā tehnoloģija |
| econ. | clean technology | tīra tehnoloģija |
| environ., UN | Clean Technology Fund | Tīru tehnoloģiju fonds |
| transp., environ. | Clean Transport Systems initiative | tīru transporta sistēmu iniciatīva |
| transp., environ. | Clean Transport Systems initiative | ekoloģiski tīru transporta sistēmu iniciatīva |
| comp., MS | Clean Up | Tīrīšana (An action that removes redundant messages from an e-mail conversation to reduce information overload and improve readability) |
| fin. | clean-up call option | dzēšanas iespēja |
| transp., mil., grnd.forc., environ. | clean vehicle | ekoloģiski tīrs transportlīdzeklis |
| transp., mil., grnd.forc., environ. | clean vehicle | "tīrs" transportlīdzeklis |
| econ. | cleaning industry | tīrīšanas līdzekļu rūpniecība |
| gen. | cleaning solvent | attaukošanas līdzeklis |
| environ. | Climate and Clean Air Coalition | Klimata un tīra gaisa koalīcija, kuras mērķis ir mazināt gaistošo klimatu piesārņojošo vielu daudzumu |
| environ. | Climate and Clean Air Coalition | Klimata un tīra gaisa koalīcija |
| environ. | Climate and Clean Air Coalition to Reduce Short Lived Climate Pollutants | Klimata un tīra gaisa koalīcija, kuras mērķis ir mazināt gaistošo klimatu piesārņojošo vielu daudzumu |
| environ. | Climate and Clean Air Coalition to Reduce Short Lived Climate Pollutants | Klimata un tīra gaisa koalīcija |
| environ. | contract cleaner A commercial service provider, usually bound by a written agreement, responsible for the removal of dirt, litter or other unsightly materials from any property | nolīgts atkritumu savācējs |
| environ. | dry cleaning To clean fabrics etc. with a solvent other than water | ķīmiskā tīrīšana |
| environ., UN | Executive Board of the Clean Development Mechanism | tīras attīstības mehānisma valde |
| chem. | gradient column cleaning | gradienta kolonnas tīrīšana |
| comp., MS | Hibernation File Cleaner | Hibernācijas faila tīrītājs (A feature that allows deletion of the files created during hibernation) |
| transp., avia. | Joint Technology Initiative on Clean Sky | kopīga tehnoloģiju ierosme "Clean Sky" |
| environ. | street cleaning The process of removing dirt, litter or other unsightly materials from city or town streets | ielu tīrīšana |
