But carbon market watchers says to ban so-called "grey" Emissions Reduction Units is a token move that will do nothing to restore the value of New Zealand Units.

Attempts to limit the number of foreign-sourced carbon credits used to offset New Zealand's greenhouse gas emissions under its Kyoto Protocol obligations are blocked.

The peak Maori body advising the government on climate change issues says the weak provisions intended for the Emissions Trading Scheme are robbing Maori of hundreds of millions of dollars. 

Manufacturing sector staff cuts will be even higher if the government takes the purist approach turged by opponents.

The National Party's pre-election pledge to keep amendments to the emissions trading scheme fiscally neutral has been blown out of the water.

Politicians are in for an ear bashing from environmentalists and foresters at select committee hearings today.