Environmental groups say the National Party's environment and conservation policies lack detail and firm commitments.
National formally issued the policies on Waiheke Island at the weekend.
The Sustainability Council says National is right to focus on improving environmental governance and administration, but has failed to give details of how that would happen.
The Environmental & Conservation Organisations group says it's worried that plans to streamline the Environment Ministry and the Resource Management Act could mean cuts to staff, funds or legislation.
The Royal New Zealand Forest & Bird Society says it's worried about an absence of funding commitments to the Department of Conservation.
Greenpeace says it can't take the policies seriously because they virtually ignore climate change.
National says it will reduce greenhouse gas emissions to 50% of 1990 levels, by 2050.