Pacific Ocean

The world's largest geographic feature, the Pacific Ocean covers more than 166 million square kilometers (more than 64 million square miles)—about one-third of the earth's surface. The area of the Pacific is greater than that of all of the continents combined, and it makes up nearly half of the area covered by the earth's oceans.

Some of the current issues include -
endangered marine species include the dugong, sea lion, sea otter, seals, turtles, and whales; oil pollution in Philippine Sea and South China Se.