RT @CarlvKeirsbilck: @Mike_Honey_ Ventilation would indeed have a big impact simply because schools are very bad ventilated. European study…
1,318 followers
1,908 followers
RT @CarlvKeirsbilck: @Mike_Honey_ Ventilation would indeed have a big impact simply because schools are very bad ventilated. European study…
3,391 followers
RT @CarlvKeirsbilck: @Mike_Honey_ Ventilation would indeed have a big impact simply because schools are very bad ventilated. European study…
2,287 followers
RT @CarlvKeirsbilck: @Mike_Honey_ Ventilation would indeed have a big impact simply because schools are very bad ventilated. European study…