On Tuesday Ms Giddings revealed she was sending Deputy Premier Bryan Green to China and Japan to look at several issues, including forestry.

Ms Giddings said she also would consider sending Opposition Leader Will Hodgman, after he asked to help promote the state's timber industries to overseas markets.

Yesterday Greens Senator Christine Milne said the trip represented ``a complete breach of faith,'' as it undermined the intergovernmental agreement.

``The Australian people, having seen the Premier and the Prime Minister on television saying this is a historic agreement to protect high conservation-value forests now find the Premier is doing exactly the opposite,'' she said.

However, Ms Giddings said the government was trying to work with industry and environmental groups to get the most sustainable industry they could.

``We've got to have some form of sustainable industry that can help provide the demand while also protecting the trees that need to be protected,'' she said.

Ms Giddings said it was too early to say how much the trip would cost but insisted it was worth the money.

``What we need to be doing right now is going on the front foot promoting Tasmania, promoting Tasmania's produce, promoting what's good about this state,'' she said.

Mr Hodgman said he welcomed what he described as an ``international forestry trade mission'' - a term Ms Giddings rejected - but he was disturbed that the Premier didn't tell the two Greens ministers that it was being planned.

``It's no wonder that our overseas trade markets are confused about the government's policy on timber, when the government can't even agree amongst themselves,'' he said.

However, Greens leader Nick McKim rejected any suggestion that he first heard of the trip via the media. Ms Giddings said she had told Mr McKim before the media were told.