### Clue: C-collared by this new technology! It'll make you go green (6,7)
### Answer: CARBON CAPTURE 
 ### Explanation: Definition: this new technology! It'll make you go green
 Cryptic defn: Reference to what this new environment-friendly technology does: to CAPTURE(to collar;to seize, eg. a fugitive) CARBON(the element whose chemical symbol is C), found in waste carbon dioxide, and to store it where it does not get into the atmosphere.