Perhaps you should try some spelling variations:
"potential co2 emission and energy radiation" » "potential co2 emission and energy equation", "potential co emission and energy radiation", "potential cost emission and energy radiation", "potential c emission and energy radiation"
"potential co2 emissions and energy radiation" » "potential co2 emissions and energy equation", "potential co emissions and energy radiation", "potential cost emissions and energy radiation", "potential c emissions and energy radiation"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"potential co2 emission and energy radiation\") OR (\"potential co2 emissions and energy radiation\"))".
• Removing quotes may allow a broader search: (( potential co2 emission and energy radiation ) OR ( potential co2 emissions and energy radiation )).
• Adding a wildcard symbol may retrieve word variants: (("potential co2 emission and energy radiation") OR ("potential co2 emissions and energy radiation"))*.