Man's impact on the environment

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Man's impact on the environment by Mind Map: Man's impact on the environment

1. Negative

1.1. Deforestation

1.1.1. People like us burn down forests and trees to make way for modern buildings and this has caused global warming

1.2. Global warming

1.2.1. Littering Littering plastics or unnatural products may harm the earth when they are burnt or buried. Some of them are not biodegradable and hence the amount of waste on planet earth will be a lot. So the rubbish that are non biodegradable will be burnt and is a main factor of global warming. Research has shown that by 2050 the amount of trash will be so much that new landfill islands will have to be made to accommodate with these trash. Humans, who find building islands expensive, have resorted to throwing trash in the sea and if the waste are not treated, this may be a hazard to the sea plants and animals as well as the sea. Research has also shown a drastic increase in the height of the sea level. This may cause flooding and natural disasters to happen. To add on to that, some animals that eat these microtrash which break up to smaller pieces die due to the amount of waste in their bodies that led them to think that they are already very full and need not eat anymore. This has also caused plants which take them in to die. Perhaps the fish (for example the tuna) that ate another fish had eaten the microtrash, and we eat it...perhaps the seaweed had taken in the microtrash... What are other effects of littering? Well, when people litter cigarettes or cigarette cases on the ground, birds may make a nest out of them and these are harmful to the birds which may eat them!

1.2.2. Pollution Air pollution Air pollution can also come from the factory that emits poisonous and harmful gases into the atmosphere that may affect the amount of greenhouse gases and worsen global warming. Land pollution/water pollution When plastics or other non-biodegradable materials are thrown or buried in the earth, they break into smaller pieces called microtrash. These microtrash will eventually break down even further and perhaps lead to water pollution. In the 1970’s, over 2 million old tires were sunk to the sea floor off the coast of Fort Lauderdale, Florida to create an artificial reef.Well, on the surface, the plan wasn’t that bad as many sea creatures like mussels, barnacles, and tube worms needed solid structure to attach to. These organisms can help build the base of a food web to feed larger organisms like fish. Not to mention, many fish like having structures to hide in or around. You may be thinking that the tires would leach chemicals into the water, but that was actually was not the problem. The problem was that when the tires were tethered together and anchored to the bottom with steel clips attached to concrete blocks, the clips later corroded and thus allowing the tires to break free, eventually smashing into natural reefs and destroying them during storms.Up to this day, the tires are still there... Light pollution Artificial light at night is one of the most obvious physical changes that humans have made to the biosphere, and is the easiest form of pollution to observe from space. The main environmental impacts of artificial light are due to light's use as an information source (rather than an energy source). The hunting efficiency of visual predators generally increases under artificial light, changing predator prey interactions. Artificial light also affects dispersal, orientation, migration, and hormone levels, resulting in disrupted circadian rhythms.

1.3. When an invasive species starts wreaking havoc on an ecosystem because it has no natural predators to keep its population in check, it may seem like a good idea to introduce a predator to control it. Unfortunately, this doesn’t always work out so well. A famous example in ecological textbooks is the introduction of the cane toad into Australia. It was introduced to combat the cane beetle that was devastating the sugar cane crop. This failed miserably as the toads were unable to eat many of the beetles. They did, however, thrive by feeding on other insect species and harmed potential predators of the toad with toxins they could emit from their skin. Generally speaking, vertebrates are a bad choice for biological control agents because they usually do not specialize on a specific target species. Therefore, they will impact other aspects of the ecosystem. Since this mistake almost 100 years ago, scientists have recognised the risks of introducing biological control agents and now conduct rigorous testing before releasing any biocontrol agents into the wild.

1.4. Feeding human's food to certain animals.

1.4.1. This may cause a sickness called angel's wing which is when the wings of a duck or chicken has to stay outside of the body and is twisted slightly upwards towards the sky. This may cause discomfort to the animal and is one of the effects of negative pollution.

2. Positive

2.1. Reforestation

2.1.1. The people, instead of tearing down the trees, build more so as to achieve a fresher air. This helps us in many ways too. It may supply us with more oxygen and shade.

2.2. Reuse

2.2.1. We reuse the bags that we have used for buying food or other things for lining the bins or any other way.

2.3. Reduce

2.3.1. We reduce the amount of waste being emitted by us.

2.4. Recycle

2.4.1. We humans can recycle plastics, metal pull tabs or metal, paper and many other types of materials. They can then be processed and cleaned before being made into a fresh new object.

2.5. Refuse

2.5.1. Using recycled bags instead of plastic bags (Refusing to use plastic bags):) Plastic bags are not bio-degradable and as recycled bags are, we should use them to reduce our carbon footprint.

2.6. Conservations of flora and fauna

2.6.1. We set up conservation areas, botanical gardens, national parks, wildlife sanctuaries, biosphere reserves and as a result,humans play a significant role in the conservation of flora and fauna.

2.7. Humans do not pollute the water by using techniques like rain water harvesting , watershed management, drip irrigation which helps in the conservation of water resources

2.8. Use of renewable sources of energy

2.8.1. We humans use solar energy, biofuels, wind energy etc.