This is in terms of terrestrial, land-dwelling life. In terms of aquatic life, researchers know very title of what is potentially in our earth’s waters. However, it is safe to say that it may be even more diverse and numerous than what lies above the surface of the oceans and lakes, considering oceans cover about 75% of the earth’s surface. Consequently, with all the life on earth, natural competition and selection takes place between everything to determine who and what lives and dies, including human beings.The problem is this; humans have taken the “natural” out of “natural competition”, because they do not extract and use their resources in a natural and sustainable way. We humans, degrade and take horrible care of our planet.
The degradation of earth is caused by many human factors. Today I am going to talk about 3 of them. First I will talk to you about deforestation. Next will talk to you about Ocean pollution. Last, I will talk to you about overfeeding.
Each brings its own unique onslaught of problems.Each provides just another way in which the earth can become less beautiful. In the Oceans and on land, there is an abundance of diverse life, especially the rainforest’s. Sentenced says the rainforest’s is home to approximately 70% of the world’s animal species and 25 % of the world’s medicine is derived from rainforest’s plants. Unfortunately, deforestation is clearing Earth’s rainforest’s, which according to national geographic, cover about 30% of earth’s land surface.
This almost always results in damage to the quality of the land.Rainforest’s are cut down for many reasons, but most of them are related to money or to people’s survival. The biggest reason for deforestation is agriculture.
Farmers cut forests to provide more room for planting crops or grazing livestock. Logging operations, which provide the world’s wood and paper products, also cut nettles trees each year. Loggers, some of them acting illegally, also build roads to access more and more remote forests, which leads to further deforestation.
Forests are also cut as a result of growing arbitration. However, not all deforestation is intentional.Some is caused by a combination of human and natural factors like wildfires and overgrazing, which may prevent the growth Of new trees.
So, aside from obvious habitat destruction, what is so bad about deforestation? Removing trees deprives the rainforest’s of portions of its canopy, which blocks the sun’s rays during the day and holds in heat at night. This disruption leads to more extreme temperatures swings that can be harmful to plants and animals. Forest soils are moist, but without protection from sun-blocking tree cover they quickly dry out.Trees also contribute to the water cycle by returning water vapor back into the air. Without trees to perform this process, many rainforest’s would quickly become arid deserts (National Geographic Society, Deforestation). Another problem is one that has to do with the root systems in rainforest’s. The roots of the massive trees in the rainforest’s keep the soil nutrient rich and hard packed. When trees are cut down, most of the time the stumps are not removed, which prevents new trees from growing in their place.
When the stumps lie there dormant, the roots eventually die out and no longer enrich the soil or hold it in place. This leads to a number of problems. First, the soil obviously would not be rich enough to sustain plant life and this would disrupt the nitrogen cycle. Secondly, without firm soil, the ground is not hard packed and layered. Over time, it will become layered with loose silt and sand. Soil this loose provides the perfect opportunity for a andesine, which almost inevitably would damage parts of the rainforest’s that are still healthy.
Deforestation does much more than just destroy trees.It is a chain reaction. F people flatten rainforest’s, the landscaper water cycle, nitrogen cycle, climate, habitat, and ultimately, the life cycle are all negatively impacted.
Yet, humans still continue to destroy without an afterthought, a pretty impulsive and senseless action. However, there are plausible, realistic solutions to the problem. The quickest solution would be to simply stop cutting down trees, UT that is a completely unrealistic expectation. The more plausible solution would be to cut down only the older areas of any forest and remove the stumps.Doing this would present the opportunity for new trees to be planted, and make the trees of the forest more evenly dispersed in age. Plus, the trees in the older area of a forest may die out navy and be less productive for the ecosystem, so it would actually be very beneficial to cut down trees in this fashion. However,protecting the rain forest is just a portion of the battle.
Now that have talked to you about deforestation, want to talk o you about Ocean pollution. Water is essential for human survival, and how does the general population recognize this? Y coining the phrase “The solution to pollution is dilution. ” (National Geographic Society, The Ocean). In other words, people believe the ocean is so vast and deep that no matter how much trash and chemicals humans dumped into them, the effects would be negligible. This couldn’t be farther from the truth. There is evidence that the oceans have suffered at the hands of mankind for millennia. Recent studies show that degradation, has accelerated dramatically n the past three centuries as industrial discharge and runoff from farms and coastal cities has increased (The World’s Biggest Landfill, Ocean Pollution).Common man-made pollutants that reach the ocean include pesticides, herbicides, chemical fertilizers, oil, sewage, plastics, and other solids.
Many of these pollutants collect at the ocean’s depths, and get eaten by small marine organisms and that introduces them into the global food chain. Scientists have even found that pharmaceuticals ingested by humans are being found in some of the fish we consume (National Geographic Society, The Ocean). This information makes it sound like it’s so harmful to us, but the real problem is the millions of marine organisms and birds who mistake this stuff as food.Discarded fishing nets drift for years, ensnaring fish and mammals. Everyone has seen pictures of seagulls covered in oil, or with plastic bottle rings stuck around their neck. Things like this end up killing these creatures.
Pollution is just one of many problems when it comes to Ocean degradation. Now that Vive told you about deforestation and ocean pollution, I want to talk to you about overfeeding. Ocean overfeeding is simply taking wildlife from the sea at such a rate that the fished species cannot reproduce quickly enough. Urge fishing companies are extremely aggressive, devouring the world’s oceans and developing methods and technologies for finding, fishing, and processing their target fish. People have grown extremely accustomed to having access to a wide selection of fish at moderate prices. However, the outlook for overfeeding is looking favorable.
National geographic reports that in 1 989, when about 90 million tons of catch were taken from the ocean, the industry had hit its high-water mark, and yields have declined ATA large rate ever since.Fisheries that were after the most in-demand fish collapsed following this year because of the short supply and the unchanging high demand. With a stricter enforcement of fishing policy, and the recent significantly lower rate of overfeeding, it is possible that fish populations will rise exponentially, and the problem itself will become not so crucial. In this speech I first talked about deforestation, next talked about ocean pollution, and last I talked about overfeeding. The earth really is a delicate balance. Once something is thrown off balance, a chain reaction ensues, and degradation of our earth is such a good example of this.
It’s easy to see firsthand how humans have offset the balance of things. Now species are becoming threatened, endangered, and extinct because of carelessness. This earth is billions of years old and was inhabited by plants and animals far before humans came along, and now that they we are around, the world is turning into a less beautiful place at the work of our hands. Somehow, within the couple millions of year humans have inhabited earth, we have not learned to sustainable and harmoniously co-exist with their surrounding environment.