Science, asked by bhatisavita92, 1 month ago

D1 write a note & Plastic is intulious
4001
for
our environment?
yurious​

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Answered by kirnarani84
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Answer:

Plastic pollution is the accumulation of plastic objects and particles (e.g. plastic bottles, bags and microbeads) in the Earth's environment that adversely affects wildlife, wildlife habitat, and humans.[1][2] Plastics that act as pollutants are categorized into micro-, meso-, or macro debris, based on size.[3] Plastics are inexpensive and durable making them very adaptable for different uses; as a result levels human produce a lot of plastic.[4] However, the chemical structure of most plastics renders them resistant to many natural processes of degradation and as a result they are slow to degrade.[5] Together, these two factors allow large volumes of plastic to enter the environment as mismanaged waste and for it to persist in the ecosystem.

Plastic pollution in Ghana, 2018

A stream in the Madagascar district in Douala flooded with plastics

The pathway by which plastics enters the world's oceans

Ocean plastic pollution

Plastic pollution can afflict land, waterways and oceans. It is estimated that 1.1 to 8.8 million tonnes of plastic waste enters the ocean from coastal communities each year.[6] It is estimated that there is a stock of 86 million tons of plastic marine debris in the worldwide ocean as of the end of 2013, with an assumption that 1.4% of global plastics produced from 1950 to 2013 has entered the ocean and has accumulated there.[7] Some researchers suggest that by 2050 there could be more plastic than fish in the oceans by weight.[8] Living organisms, particularly marine animals, can be harmed either by mechanical effects, such as entanglement in plastic objects, problems related to ingestion of plastic waste, or through exposure to chemicals within plastics that interfere with their physiology. Degraded plastic waste can directly effect humans through both direct consumption (i.e. in tap water), indirect consumption (by eating animals) and disruption of various hormonal mechanisms.

As of 2018, about 380 million tonnes of plastic is produced worldwide each year. From the 1950s up to 2018, an estimated 6.3 billion tonnes of plastic has been produced worldwide, of which an estimated 9% has been recycled and another 12% has been incinerated.[9] This large amount of plastic waste enters the environment, with studies suggesting that the bodies of 90% of seabirds contain plastic debris.[10][11] In some areas there have been significant efforts to reduce the prominence of free range plastic pollution, through reducing plastic consumption, litter cleanup, and promoting plastic recycling.[12][13] As of 2020, the global mass of produced plastic exceeds the biomass of all land and marine animals combined.[14] A May 2019 amendment to the Basel Convention regulates the exportation/importation of plastic waste, largely intended to prevent the shipping of plastic waste from developed countries to less developed countries. Nearly all countries have joined this agreement but the world's largest producer of plastic waste, the United States, opposed it.[15][16][17][18]

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