Tag: Health

Natural History / Natural History - 7 years ago

What is lightering?

A lightering barge being positioned next to the freighter M/V Montrose in 2007. (image courtesy of U.S. Coast Guard) Lightering is not possible in all oil spill scenarios. It depends on many factors including the type of oil that is spilled. A...

Natural History / Natural History - 7 years ago

What threats do seabirds face?

In California, frequent human-caused disturbances to seabirds include low-flying aircraft, close approaches by motorized and non-motorized boats, humans on foot, and general ocean and coastal users. In California, for example, nesting and migr...

Natural History / Natural History - 8 years ago

What is an invasive species?

VIDEO: What is an invasive species? Here's what you need to know in less than a minute. Transcript Invasive species can harm both the natural resources in an ecosystem as well as threaten human use of these resources. An invasive species can...

Natural History / Natural History - 8 years ago

Are all algal blooms harmful?

VIDEO: Learn how scientists predict the spread of harmful algal blooms in this video from Ocean Today. Less than one percent of algal blooms actually produce toxins. Harmful algal blooms are blooms of species of algae that can have negative i...

Natural History / Natural History - 8 years ago

What are PCBs?

PCB contamination is high in the Housatonic River and New Bedford Harbor in Massachusetts. PCBs were banned in the U.S. in 1979 amid suggestions that these chemicals could have unintended impacts on human and environmental health. Image credit: U...

Natural History / Natural History - 8 years ago

What is nutrient pollution?

Nutrients can run off of land in urban areas where lawn fertilizers are used. Pet and wildlife wastes are also sources of nutrients. To see how this happens, consider this visualization of the Chesapeake Bay, part of the largest watershed in the...

Natural History / Natural History - 8 years ago

What is resilience?

Resilience is important everywhere because all communities face hazard threats such as droughts and flooding. Coastal areas have additional hazard risk from storms such as hurricanes and increased population pressures, making resilience partic...

Natural History / Natural History - 8 years ago

What is a dead zone?

Hypoxic zones are areas in the ocean of such low oxygen concentration that animal life suffocates and dies, and as a result are sometimes called "dead zones." One of the largest dead zones forms in the Gulf of Mexico every spring. Each spring as...