A Greenpeace activist next to a buoy holds a banner reading "Stop deep sea oil" in front of the oil survey ship Orient Explorer to disrupt the seismic testing by Brazilian oil giant Petrobras in Raukumara Basin, off East Cape, North Island. Floating behind the ship, the airgun arrays release thousands of high-decibel explosions to map deposits beneath the sea floor. Deep sea oil drilling is being opposed because of the risk of oil spills polluting marine life and coastlines and the impact of climate change when the oil is burnt.