The tree is not a contributor to oxygen it turns out !!

If your answer is a tree, oops sorry was wrong. The tree is one of the contributors of oxygen, but only 20% of the planet. Trees are useful for mitigation (reducing) carbon dioxide is in the earth.

So to reduce the impact of global warming, plant the tree so it can be utilized CO2 by trees. Since the fair value of CO2 is 0.1% of the earth, but in 2010 these levels of CO2 in the atmosphere has reached 0.3%.

So the correct answer is Plankton, particularly phytoplankton is. Plankton are defined as any drifting organisms that live in the pelagic zone (upper) ocean, sea, and fresh water bodies.

Plankton widely regarded as one of the most important organisms on earth, as it becomes food for aquatic life.

For most marine life, plankton are their main food. Plankton consists of the remains of marine animals and plants. Small size. Although similar objects including life, plankton do not have the strength to fight the currents, tides or wind carry her away.

Plankton live on the coast where it gets packed mineral salts and sufficient sunlight. It is important to allow it to continue to live.

Given the plankton into fish food, not surprising that there are a lot of fish on the coast. That is why active fishing activities carried out in the region.

Besides the remains of animals, plankton are also created from plants. When viewed under a microscope, plant elements can be seen in the plankton algae. Some sea creatures that eat plankton are like rocks, shells, and whales.

Plankton are organisms which accounts for 80% of the needs of oxygen in the earth.

With its ability berespisari produce oxygen bubbles contained in the sea, the oxygen is released into the air and into a gas that we can enjoy today.

Scientists from the United States found plankton can indirectly create clouds that can withstand most harmful sun rays. So plankton can help slow the process of global warming.

Dierdre Toole of the Woods Hole Oceanographic Institution (WHOI) and David Siegel of the University of California, Santa Barbara (UCSB) are two researchers.

The study, funded by NASA revealed when the sun is shining on the sea, the upper layer of the sea (about 25 meters above sea level) heats up, causing a high enough temperature difference to the marine layer underneath. Upper and lower layers are separated and not mixed together.

Plankton live in the upper layers, but the nutrients needed by plankton there is more in the lower layers of the ocean. Therefore, plankton are malnourished.

Due to conditions of malnutrition coupled with the hot water temperature, plankton under stress making it more vulnerable to ultraviolet rays that can cause damage.

Because susceptible to ultraviolet rays, plankton try to protect themselves by producing substances dimethylsulfoniopropionate (DMSP), which serves to strengthen their cell walls.

This substance decomposes into water if the substance will be dimethylsulfide (DMS). DMS then detached itself from the sea surface to the air.

In the atmosphere, DMS reacts with oxygen to form sulfur component type. DMS sulfur components were then attached to each other and form small particles such as dust. These tiny particles are then facilitate water vapor from the ocean to condense and form clouds.

So, indirectly, plankton help create clouds. Clouds are formed causing the less ultraviolet light that reaches the sea surface, so that the plankton was free of interference by ultraviolet light.

This process actually has several years studied in the laboratory by scientists, but this was the first natural processes can be studied.

The cloud is caused by plankton, are believed to slow down the process of global warming, as well as having a major effect tehadap Earth's climate. However, to prove this, further research remains to be done careful.

Research conducted in the Sargasso Sea, off the coast of Bermuda also found it surprising that this DMS particles can decompose by itself in the air after three to five days. In fact, carbon dioxide in the air, it can last up to decades.

Due to rapid decomposition of natural DMS, DMS will not cause the greenhouse effect, unlike carbon dioxide.