The Protocol on Environmental Protection to the Antarctic Treaty (also known as the Environmental Protocol or Madrid Protocol) came into force in 1998, and is the main instrument concerned with <answer>conservation</answer> and management of biodiversity in Antarctica. The Antarctic Treaty Consultative Meeting is advised on environmental and <answer>conservation</answer> issues in Antarctica by the Committee for Environmental Protection. A major concern within this committee is the risk to Antarctica from unintentional introduction of non-native species from outside the region.
What is the main concern of the Protocol?
conservation