Outgoing chief scientist Ian Chubb says tougher greenhouse gas targets inevitable

Chubb also says hostility towards climate science may be easing but scientists still have a duty to offer unflinching advice

Australia's chief scientist through the bitter "climate wars" has some advice for scientists denigrated and disparaged by those who do not like their evidence-based advice: "don't flinch".

And as he prepares to leave the job on Friday, Ian Chubb has some unflinching parting advice - Australia will inevitably have to adopt tougher greenhouse gas reduction targets.