In news on Hurricane Katrina, the Natural Resources Defense Council is warning that the soil and air around New Orleans still contains dangerously high levels of contaminants. According to the group, floodwaters from the Hurricane deposited arsenic, lead and petrochemical compounds across the region in amounts that are potentially dangerous to human health. The watchdog group is urging the state and federal government to clean up the waste before permitting young children to return to the city.