Perhaps you should try some spelling variations:
"pollutant emissions prediction" » "pollutant emission prediction", "pollutant emissions reduction", "pollutant emissions production"
"pollutant emotion prediction" » "pollutant motion prediction", "pollutant evolution prediction", "pollutant relation prediction", "pollutant emission prediction", "pollutant action prediction", "pollutant deposition prediction"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("pollutant emissions prediction") OR ("pollutant emotion prediction")).
• Removing quotes may allow a broader search: (( pollutant emissions prediction ) or ( pollutant emotion prediction )).
• Adding a wildcard symbol may retrieve word variants: (("pollutant emissions prediction") or ("pollutant emotion prediction"))*.