The Australian Greens have condemned the Abbott Government's decision to commence airstrikes in Syria, warning it will worsen the refugee crisis and aggravate extremism.

"At a time when our community is desperate to show compassion to people fleeing war in Syria, Tony Abbott is dropping bombs," said Greens Leader Richard Di Natale.

"I'm so proud of the way Australians have told the government loud and clear that we are strong enough to offer protection to people seeking refuge from war.

The Australian Greens have today called on the Abbott Government not to mistake the use of force with showing genuine strength when it comes to helping the four million people fleeing Syria.

“Four million people are fleeing war in Syria at a time when there are record numbers of displaced people around the world. We are strong enough to give a home to 20,000 extra refugees without trading one vulnerable fleeing family for another,” said Australian Greens Leader, Dr Richard Di Natale.