Category Environtal Studies

What is wildlife crime?

In the wake of the corona virus epidemic, China has temporarily banned the sale of wildlife in markets, restaurants and over e-commerce as part of efforts to contain the outbreak. While welcoming the move, conservationists are calling for a permanent ban as it will contribute to the recovery of wildlife populations worldwide, besides saving human lives.

The corona virus, which results in a zoonotic disease, is thought to have originated in a “seafood” market in Wuhan that sold much more than fish. Chinese authorities found everything from hedgehogs and wild boars to crocodiles for sale there, providing ideal conditions for viruses to jump to new hosts and ultimately, to people. (Zoonotic diseases spread from animals to humans.) Consumption of several vulnerable species – for example, pangolins, rhinos, elephants – is common in China. There is another theory that believes that pangolin may have passed the virus from bats to humans. Pangolin is imported in huge numbers to Chinese markets for food and medicine.

A host of other animals too are important to China for meat, medicine etc. through illegal wildlife trade. China may be the world’s largest market for wildlife products, but wildlife trade is rampant throughout the world. Wildlife trafficking puts many animals and birds at risk of extinction. A study published last year estimated that one in every four bird or mammal species on earth is caught in the wildlife trade.

 

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What is AQI?

The air quality is measured by the Air Quality Index. Air quality indices have been created in different countries for the measurement of air quality. These indices measure the air quality in the country and indicate whether the amount of nitrogen dioxide, carbon monoxide and sulfur dioxide in the air exceeds the criteria set by the World Health Organization or not.

The Air Quality Index measures the quality of air. It shows the amount and types of gases dissolved in the air. There are 6 categories of the air have been created in this air quality index. 

These categories are based on air quality. These categories are; good, satisfactory, moderate, poor, very poor and severe. 

 

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Which are the common things harming the environment?

By now, it is common knowledge that human activities have a significant impact on the world’s ecosystem. Human beings have deeply altered the environment. They have directly or indirectly contributed to pollution, global warming, climate change and the destruction of biodiversity. It is high time we took measures to save the planet from further degradation. Some of you may have already resolved to adopt a sustainable lifestyle. But where should you start? Well, the best place to begin is your own home!

Many everyday items in your house can be contributing to environmental degradation because of what they are made of, how they are produced, or how they are disposed of. We are not just talking about ‘single-use’ plastic items. Of course, they are among the biggest concerns. But today, we are going to focus on the less obvious ones.

Here is a list of common things harming the environment. Next time you reach for any of these items, remember the three Rs – Reduce, Reuse and Recycle.

Wet wipes

Whether it’s wiping your face or cleaning a spill on the table, wet wipes bring ease and convenience to our lives. But the same can’t be said for the environment. Because the single-use wipes are made of synthetic cellulosic fibre and plastic fibre that don’t break down easily. When disposed of via the toilet, the non-biodegradable products block sewers. They also end up in oceans and harm marine life. Remember, paper tissues are not any better, because trees are felled to make them.

Tooth brush and face wash

Some varieties of toothpaste contain plastic microbeads, a leading contributor to the eight million tones of plastic that enter the ocean each year. Microbeads are tiny pieces of polyethylene plastic added to products such as face washes, body scrubs, abrasive cleaners and toothpastes. Microbeads can easily pass water filtration systems and end up in the sea, posing a serious threat to marine life. They do not biodegrade and as they travel, attract toxic chemicals. According to a study, a single shower using such products can result in 1, 00,000 plastic particles in the ocean. So, when you purchase a product, always check its ingredients and avoid ones with microbeads. (Look for words such as “polypropylene” and “polyethylene” on the label. They indicate the presence of plastic microbeads.)

Deodorant sprays

Aerosols sprays cans such as deodorant, air fresheners and spray paint use certain gases to propel the content from the nozzle. These gases could be hydrocarbons and nitrous oxide – both of which are greenhouse gases. The use of aerosol-coated products also results in volatile organic compounds (VOCs) emissions from the propellants and solvents contained in them. Once airborne, VOCs, in the presence of sunlight, react with nitrogen oxides to form ozone, a key cog in smog. Many sprays also contain highly toxic chemicals such as xylene and formaldehyde, which are cancer-causing agents. They also affect our neurons.

Sunscreen lotion

Common chemicals used in sunscreen creams and lotions to protect against harmful affects of ultraviolet light threaten corals and other marine life. They include oxybenzone, benzophenone-1, benzophenone-8, OD-PABA, 4-methylbenzylidene camphor, 3-benzylidene camphor, nano-titanium dioxide and nano-zinc oxide. Some of these compounds are found in more than 3,500 skin care products worldwide for protection against the sun’s harmful effects. The chemicals enter the environment through wastewater effluent or directly from swimmers wearing sunscreen. The chemicals impair growth and photosynthesis in algae; accumulate in tissues of corals and induce bleaching; and deform the young of mussels, sea urchins and dolphins.

Clothes

Apparel production is linked to environmental problems such as water and air pollution. Every year, global emissions from textile production are equivalent to 1.2 billion tones of CO2, a figure that outweighs the carbon footprint of international flights and shipping combined. Further, dyeing of apparel contributes to about 20% of global water pollution.

While production of natural fibre is linked to pesticide use and heavy water consumption, synthetic textiles contain microplastic known as microfibers, which find their way to the ocean, affecting marine life.

By keeping your clothes until they wear out, and not shopping often, you can reduce your impact.

Glitter

Glitter is made from plastic and used in a wide array of products, including in art and craft, jewellery and cosmetics. But when it is washed down the drain, it becomes part of the growing problem of microplastics, which are consumed by plankton, fish and birds. Animals die from starvation when microplastics collect in their systems, and the material can even make its way up the food chain to end up on our plates.

Paper cups

Increasing awareness and ban against plastic use have led to the shift to alternatives such as paper bags and cups. But how environment-friendly are they? Cups are technically recyclable, but due to the complicated way in which they are produced, the vast majority of coffee cups do not end up being recycled. Indeed, they are made largely of paper, but disposable coffee cups are lined with plastic polyethylene, making the cups waterproof and therefore able to contain liquid. In addition, the difficulty of recycling coffee cups is increased by the fact they are contaminated with drink. This means cups cannot be recycled at standard recycling plants, and must instead be taken to special facilities, which are minimal in number all over the world. Further, many paper cups are made from virgin paper pulp. That means trees are felled to produce them.

 

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How birds are affected by habitat loss?

There are birds like the piping plovers (Charadrius melodus) that lay their eggs directly on the sand of a beach in a shallow depression. When sea-levels rise, beaches are washed away. When temperatures rise, and wetlands dry out, ducks that live and lay eggs on them will have nowhere to go.

Same is the fate of birds that depend on coral reefs. About one third of the carbon dioxide in the atmosphere is absorbed by the ocean. When CO2 increases and the weather gets warm, more CO2 is absorbed and water becomes more acidic. Increased acidity reduces the ability of the corals to secrete calcium carbonate, which forms the structure of the reef. As a result, they become brittle and break easily. The reef structures shrink (something that happened to the Great Barrier Reef). For many birds in the tropics, corals reefs provide an important food source and are critical habitats for survival.

In Hawaii, mosquitoes that carry malaria breed in lower attitudes. Mountaintops provide protection for birds from mosquitoes since they cannot reach the area. Increasing temperatures have led mosquitoes to move further up the mountain slopes, threatening the birds that live at the top of the mountain. Avian malaria is a major reason for the decline of Hawaiian birds.

When birds move out of their habitats in search of new places to occupy, they over-exploit prey sources, leading to destruction of the entire ecosystem. Ospreys have been seen hunting other birds, so they may pose a threat to birds in the area, particularly if fish become scarce.

Recently, peafowl were found across Kerala, surprising bird-watchers. Why did they move from their habitat? Obviously in search of food and shelter. Studies also show that some species of birds are developing shorter wing spans and have less density in their bones.

 

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What should we do to protect birds from climate change?

[1] Stop climate change. Even if we end releasing greenhouse gases now, there will be continued warming by the gases released earlier. Birds will have to face a warmer planet in the coming years.

[2] Preserve bird habitats. Restore them where they have been lost. Build artificial nesting sites (simple cages for sparrows to bring them back).

[3] Continues to observe and collect data on when birds arrive at certain spots, when their numbers decline, and the connection between their numbers and the year’s temperature patterns.

[4] Grow more trees. They help to balance climate changes, keep CO2 level low and give the birds a chance to nest and survive.

[5] Keep your cat indoors. Each year, outdoor cats kill more than a billion birds in the U.S. and Canada; keeping cats inside is safer for them and better for birds.

[6] Make the spaces around your house friendly for birds. Gardens, trees, and native flowers are good for people and birds.

[7] In a factory outside Chennai, migratory birds hit the glass windows often and crashed to the ground. The management built large nets under every window to save the birds.

[8] Wherever you find a place and time, talk about birds and the need to protect them. More than 30% of our breeding birds are already declining and are in need of conservation action.

 

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How do global warming and climate change affect birds?

A good example is the study of great tits (Parus major) in Europe. These birds reproduce when caterpillars come out in spring when the buds burst out. The caterpillars gorge on the new leaves, great tits pick up the caterpillars to feed the nestlings. This maintains the bird’s survival rates.

Bird reproduction takes place just when the caterpillars are in abundance before they form their cocoons. Warmer temperatures have led to caterpillars emerging sooner. The birds lay eggs too late, and the caterpillars are gone. The cues the birds use to reproduce are not matching up with the peak prey availability. This can reduce the number of eggs they lay.

Pied flycatchers (Ficedula hypoleuca) spend the winter in tropical Africa before migrating to Europe in the spring to breed, They use day-length change in their wintering grounds as a cue for migration. But prey availability is based on temperature, and due to climate change, it starts earlier in the year. The birds do not arrive at breeding grounds in time to take advantage of peak prey. See the mismatch? The fly-catcher population has declined more than 90% in some areas.

The snow bunting is adapted to very specific mountain habitats. When climate changes, they cannot find food. The ranges of boreal birds in Northern Europe are predicted to decrease by more than 73% over the next century.

 

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