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44

Arctic ice, around the north pole floats on top of water. When it melts it does not add to sea level rises and likewise for other ice on water, as illustrated in this video and this video. Ice on land is a different matter. Ice on Greenland, Antarctic land & glaciers around the world will add to sea level rise because any melt water will eventually end ...


14

Because a lot of that ice is currently sitting on land. When it melts, it will go into the ocean. From the National Snow and Ice Data Center Page (NSIDC), Facts about glaciers: Presently, 10 percent of land area on Earth is covered with glacial ice, including glaciers, ice caps, and the ice sheets of Greenland and Antarctica. Glacierized areas cover over 15 ...


7

Many animals can eat through plastic to get to what they really want to eat. Among them: termites, mice and myself when battling against a candy wrapper. However, as far as I understand, none of them can degrade the plastic. You can do the test yourself and I'll guarantee the plastic wrapper will come out the other end of your digestive system. ...


5

Some simplifying assumptions This is quite a broad and complex question to answer, so I'm going to simplify it shamelessly to make it a little more answerable. Firstly, there are a huge number of different plastics with a huge variety of physical characteristics. You mention that you're interested in ‘the most common type of plastics’, so I'm going to ...


5

The idea of a carbon sink is a bit misunderstood here. The idea of a carbon sink is a reduction of carbon that comes from the atmosphere. It must “fix” carbon that is already in the air. Trees are a carbon sink, for the most part, because their mass is made of of carbon obtained from The atmosphere. Unless the plastic formation process you are thinking of is ...


4

Loss of ice mass floating in oceans has negligible contribution to sea level rise. Loss of ice mass over land does contribute to sea level rise. It is the net balance (the difference) between flow of ice and meltwater into the oceans and the amount of snowfall in the catchment that determines the overall change to a glacier's ice mass and that determines if ...


3

Your question mixes a few independent issues. Two of the statements are undisputed: Yes, melt water has a smaller volume than the ice from which it comes. But obviously, that (smaller) volume of melt water still adds to the sea water and hence lets sea levels rise if the melted ice was on land before. Melting ice that is swimming does indeed not contribute ...


3

About 18.2 million tons sink to the ocean floor. Every year, an astonishing 260 million tons of plastic waste is produced, and about 10% of it ends up in the ocean. Over time, roughly 70% of the plastic that ends up in the ocean sinks to the ocean floor. Therefore 18.2 million tons of plastic waste end up on the ocean floor. I used this article for my ...


3

Most plastics are made from the already-sunk carbon of crude oil or natural gas, and as a result, can be at best carbon neutral. However, bioplastics such as cellulose acetate or polylactic acid are derived from plant sources; the carbon here comes from the atmosphere, and they can theoretically act as carbon sinks. However, even if we switched all our ...


2

I take it that your iron balls are hollow and made of rust resistant steel. It would be a fiendishly expensive project, but I doubt it would have the result you suggest. The iron balls would have to be linked together by chain or rope to prevent them dispersing in ocean currents and ending up on beaches around the world, like the cargo of plastic ducks which ...


2

Plastic is a much less efficient carbon sink than the original crude oil if it had been left in the ground or any natural method for storing carbon such as peat bogs. It is still technically a carbon sink but is starting to be broken down naturally so is not a renewable or sustainable one. Pollution and green house gasses are a major part of plastic ...


1

A few of us here have given eminently reasonable answers already, but I think I know where your confusion comes from. The argument "ice is less dense than water hence it must result in less volume if they melt in water" only works if the ice you are talking about is completely submerged in water. Recall the images of icebergs you've seen -- none is ...


1

Thermal expansion of the ocean is responsible for about half the sea level rise: First, warmer water expands, and this "thermal expansion" of the ocean has contributed about half of the 2.8 inches (7 centimeters) of global mean sea level rise we've seen over the last 25 years, Nerem said. Second, melting land ice flows into the ocean, also ...


1

The enzymes from maggots bred on plastic allowed ground up larva paste to also digest. I believe they were able to isolate and synthetically generate the enzymes. Seemed like they can really just apply and let sit, but they probably narrowed down thermal and pressure conditions for maximum enzyme effectiveness.


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