The ocean is the engine of global environment, using its vast array to make a difference. It affects the Earth’s climate, maintains biodiversity, regulates weather patterns and produces resources that are as much necessary to life on this planet. Nevertheless, human activities and nature have been stressing the marine system excessively, with catastrophic results on the environment both positive and negative.
. Of course, I agree that Climate Regulation and Carbon Sequestration is a significant Services of nature!
The sea has a very important job within our surroundings, such as climate regulation. The oceans take up around 93 percent of the excess heat created by human activities, limiting the impact on global warming. They are also a huge carbon sink, taking up about one quarter of the human-induced CO2 emissions each year. The vegetation includes, among others the phytoplankton that photosynthesize and thus uptake carbon dioxide from de atmosphere, which helps to reduce global warming. But this absorption of carbon can also be a double-edged sword. In response to the expanded CO2 levels, marine species are affected by ocean acidification — especially those with calcium carbonate shells or skeletons (like corals and some plankton) only further stake the problems in sea creatures of Climate change

Species and Habitat Support
The sea is the home to an enormous range of life forms, from minute plankton all the way up to the largest whales. Coral reefs, mangroves and seagrass beds are crucial ecosystems that hundreds of thousands species rely on as habitat. For example, less than 1% of the ocean floor is covered by coral reefs yet they support an estimated 25 % of all marine life. Seagrasses and mangroves are key nursery habitats to a host of species, providing shelter and a bountiful food source. In addition, these ecosystems play a protective role by acting as buffer areas which serve to protect our coastlines from erosion and storms. The habitats were largely intact when they were submerged by rising sea levels beginning about 6,500 years ago. But decades of human activities such as overfishing, coastal development and pollution have damaged or destroyed many of these critical marine habitats around the world. Suddenly, coral bleaching, correlated to the colorless putting stress warmer water puts on stressed corals leading to the algae being ejected from tissues.
Government Regulation of Weather
The ocean has a big effect on weather and climate patterns worldwide. Better understanding of how ocean currents operate as a sort of global conveyor belt that moves warm and cold water around the planet, which in turn helps control temperatures. For example, the Gulf Stream carries warm water from the Gulf of Mexico into northern regions of the North Atlantic and helps to keep countries such as those in Western Europe warmer in winter than they would otherwise be. Oceans are also central to the generation of weather for instance in hurricanes, typhoons and monsoons. The consequences that are anticipated to arise from increased frequency in extreme weather events, as illustrated by the greater marine heatwaves facilitated by global warming, can be debilitating for both coastal and inland areas.

Resource Provision
Oceans provide food, Global warming energy and a wide variety of materials. Marine fisheries provide employment to millions of people worldwide and are a major source of protein for over 3 billion people. Sea bioenergy, wind power and wave power are a few other type of ocean power that has the potential to be utilized as renewable energy sources. Marine organisms are also used in biotechnology, medicine and agriculture. Yet destructive practices like unsustainable fishing, pollution from plastics and chemicals, and habitat destruction are draining the ocean of its natural capital at an unprecedented pace. Many fish stocks have already collapsed due to overfishing and the health of marine life and ecosystems is being threatened by pollution.
Pollution and Its Impacts
Pollution, wastage of plastic in the sea is one of the most notable environmental problems that has to face. Around 8 million metric tons of plastic are thrown into the oceans every year, devastating marine life. Consuming plastic is a big problem for animals such as sea turtles, seabirds fish, who eat pieces of debris thinking they are food – and then either become ill or die. They also are a factor in the marine food chain and are present from plankton to top predators, and eventually can make their way into the human food supply through seafood. Furthermore, agricultural runoff and oil spills contribute to chemical pollution next to plastics as additional sources of spreading toxins that bioaccumulates from industrial waste deep within the marine food chain.
Rising Sea Levels
Climate change, through both warming—increasing evaporation—and sea level rise—the thermal expansion of seawater and the melting of ice sheets and glaciers—is another major environmental challenge. Coastal areas are vulnerable to increased flooding, erosion and sea water encroachment on the fresh water tables with rising sea levels. The effects of climate change are even more dangerous in low-lying islands and coastal cities where millions will have to move from their homes and hug portions of arable land may be lost.
Conclusion
On one hand, the sea represents a complex and dynamic environment impacting global climate, biodiversity and resources. Nevertheless, it is an ecosystem that has been damaged by humans in numerous ways. The health of the ocean is central to the processes that allow life on this planet, so preserving its balance is fundamental. But it is less widely appreciated that such protection comes as a direct result of sustainable marine practices, pollution reduction and climate change all three of which are imperatives for the health of every one.