We can provide pollen and air pollution data for targeting for the USA and other countries on request. However we do not hold this data, and so would have to source the data from a 3rd party - which does come at a premium.
The costs just for pollen can be as much as several thousand dollars per month for US-wide coverage. On top of that there would be some additional cost relating to the developmental work involved for us to create the custom integration for you. If you are interested in triggering ads based on pollen or pollution data please get in touch with us to discuss your requirements.