| A | B |
| ALREDEDOR | around |
| APAGAR | to turn on |
| EL APARATO | appliance |
| EL DISCO COMPACTO | compact disc |
| EL MEDIO AMBIENTE | enviroment |
| EL OCÉANO | ocean |
| EL OCIO | leisure time |
| EL PETRÓLEO | petrolium |
| EL PLÁSTICO | plastic |
| EL PLOMO | lead |
| ENCENDER* | to light |
| LA ANTENE PARABÓLICA | salelite |
| LA BASURA | trash |
| LA COMPUTADORA / EL ORDENADOR | computer |
| LA CONTAMINACIÓN | contamination |
| LA ENERGÍA ELÉCTRICA | electricity |
| LA ENERGÍA NUCLEAR | nuclear energy |
| LA ENERGÍA SOLAR | solar energy |
| LA FÁBRICA | factory |
| LA SELVA | jungle |
| QUEMAR | to burn |
| RESCATAR | to rescue |
| SOBRE | over |
| DAÑAR | to hurt / damage |
| DESECHAR | to throw away |
| DESPERDICIAR | to waste |
| EXTINGUIR | to extinguish (make extinct) |
| PREVENIR* | to prevent |
| PREDECIR* | to predict |
| EL/LA ASTROFÍSICA(A) | astrophysicist |
| EL/LA BIOQUÍMICO(A) | biochemist |
| EL/LA GENETISTA | geneticist |
| EL/LA INGENIERO | engineer |
| EL/LA MICROBIÓLOGO(A) | microbiologist |
| EL/LA PROGRAMADOR(A) | computer programmer |
| EL ACERO | steel |
| EL ADN (ácido desoxirrubonucleico) | DNA |
| EL ALUMINIO | aluminium |
| EL CÁNCER PULMONAR | lung cancer |
| EL CARBÓN | carbon |
| EL CARTÓN/ LA CARTULINA | cardboard |
| EL CONBUSTIBLE | fuel |
| EL CRISTAL | glass |
| DIÓXIDO DE CARBONO | carbon dioxide |
| EL EFECTO INVERNADERO | greenhouse effect |
| EL ENFISEMA | emphasema |
| EL ENVEJECIMIENTO | aging |
| EL HUMO | smoke |
| EL INFARTO CARDÍACO | heart attack |
| EL MONÓXIDO DE CARBONO | carbon monoxide |
| EL NIVEL | level |
| EL OXÍGENO | oxigen |
| EL RADAR | radar |
| EL RASGO | characteristic |
| EL URANIO | uranium |
| EL VIENTRE | womb |
| LA ASMA | asthma |
| LA ASTROFÍSICA | astrophysicist |
| LA ATMÓSFERA | atmosphere |
| LA BIOQUÍMICA | biochemist |
| LA BROQUITIS | bronchitis |
| LA CAPA DE OZONO | ozone layer |
| LA CENIZA | ash |
| LA CIBERNÉTICA | web design |
| LA DESTRUCCIÓN | destruction |
| LA GENÉTICA | genetics |
| LA IMPRESORA | printer / printing press |
| LA INGENIERÍA NUCLEAR | nuclear energy |
| LA JORNADA LABORAL | workday |
| LA LLUVIA ÁCIDA | acid rain |
| LA MADERA | wood |
| LA MATERIA PRIMA | raw material |
| LA MICROBIOLOGÍA | microbiology |
| LA ONDA | radio waves (microwaves - not the machine) |
| LA PROGRAMACIÓN | programming |
| LA RADIACIÓN | radiation |
| LA SELVA | jungle |
| LA SEQUÍA | drought |
| LAS ASPECIES EN PELIGRO DE EXTINCIÓ | endangered species |
| LOS MEDIADOS | half-way through |
| AMBIENTAL | environmental |
| DAÑINO(A) | damaging |
| NEFASTO(A) | disasterous |
| POTABLE | safe to drink |
| GRAVE | serious |
| CONSERVAR | to conserve |
| CONTAGIAR | to infect |
| CONTAMINAR | to contaminate |
| DAÑAR | to hurt / damage |
| DEFORESTAR | to remove the trees (deforest) |
| DESECHAR | to throw away |
| DESTRUIR* | to destroy |
| PROTEGER* | to protect |
| PURIFICAR | to purify |
| RECICLAR | to recycle |
| RESCATAR | to rescue |
| SECAR | to dry |
| AGRAVAR | to aggravate / to make worse |
| AVANZAR | to advance / to make better |
| CONSTRUIR* | to construct |
| CONVERTIR | to convert |
| DESAPARECER | to disappear |
| FABRICAR | to build / fabricate |
| PREDECIR* | to predict |
| PREVER | to foresee |
| LA CONSERVACIÓN | conservation |
| EL CONTAGIO | infection |
| LA CONTAMINACIÓN | contamination |
| EL CONTAMINANTE | contaminant |
| EL DAÑO | damage |
| LA DEFORESTACIÓN | deforestation |
| EL DESECHO | waste |
| LA DESTRUCCIÓN | destruction |
| LA PROTECCIÓN | protection |
| LA PURIFICACIÓN | purification |
| EL RECICLAJE | recycling |
| EL RESCATE | rescue |
| LA SEQUÍA | drought |
| LA GRAVEDAD | seriousness / gravity |
| EL AVANCE | advance / headway |
| LA CONSTRUCCIÓN | construction |
| LA CONVERSIÓN | conversion |
| LA DESAPARICIÓN | disappearance |
| LA FABRICACIÓN | manufacture / manufacturing |
| LA PREDICCIÓN | prediction |
| LA PREVISIÓN | prevention |
| CONVERSERVADO(A) | conserved |
| CONTAGIOSO(A) | infected |
| CONTAMINADO(A) | contaminated |
| DAÑINO(A) DAÑADO | hurt / damaged |
| DEFORESTADO(A) | deforested |
| DESECHADO(A) | thrown away |
| DESTRUIDO(A) | destroyed |
| PROTEGIDO | protected |
| PURO(A) | pure |
| PURIFICADO(A) | purified |
| RECICLADO | recycled |
| RESCATADO(A) | rescued |
| SECO(A) | dry |
| GRAVE | serious |
| AVANZADO(A) | advanced |
| CONSTRUIDO(A) | built / constructed |
| CONVERTIDO | converted |
| DESAPARECIDO(A) | dissapeared |
| FABRICADO(A) | built / manufactured |
| PREDICHO | predicted |
| PREVISTO | foreseen |