Die Aufgabenstellung:
1,6♦
Fill in the gaps by changing words from the text into the appropriate form.
Glass:
Glass can be recycled in the form of bottles and jars which are crushed down and then melted. Glass can be recycled infinitely because it does not degrade through the recycling process. It uses a lot less energy, fewer raw materials and produces less CO2 than manufacturing glass from scratch. The main difficulty with recycling glass is the need to remove the unwanted materials that contaminate it and avoiding the mixing of different colours.
Paper:
Glass can be recycled in the form of bottles and jars which are crushed down and then melted. Glass can be recycled infinitely because it does not degrade through the recycling process. It uses a lot less energy, fewer raw materials and produces less CO2 than manufacturing glass from scratch. The main difficulty with recycling glass is the need to remove the unwanted materials that contaminate it and avoiding the mixing of different colours.
Paper:
As well as saving natural habitats, recycling paper is more energy-efficient than producing paper from trees. Nearly all types of waste paper are recyclable, but paper cannot be recycled indefinitely. At a recycling plant the paper is separated into types and grades, washed with soapy water to remove inks, plastic film, staples and glue. Then it is mixed with water to create ‘slurry’. By adding different materials to the slurry, different paper products can be created, such as cardboard, newsprints or office paper. The slurry is spread using large rollers into large thin sheets, which are left to dry, before being rolled up ready for reuse.
Plastic:
There are many different sorts of plastic in use, some of which require special and less available technologies to recycle it efficiently. However plastic bottles are usually made from two easily recyclable plastics – PET and HDPE. First the plastic must be sorted, then any contaminates removed. The plastic is either melted down directly and moulded into a new shape, or shredded into flakes then melted down before being processed into granulates.
Metal cans:
There is a high recycling rate for metal cans in the UK, with aluminium recycling and steel cans being the most common items. Metal can be recycled indefinitely, and aluminium cans use just 5% of the energy needed to produce them from scratch and only release 5% of the amount of greenhouse gases. In addition, it is the easiest material to extract and separate from the other recyclables. In the treatment plant the aluminium is sorted and cleaned ready for melting into molten aluminium, which removes any coatings and inks that may be present.
Plastic:
There are many different sorts of plastic in use, some of which require special and less available technologies to recycle it efficiently. However plastic bottles are usually made from two easily recyclable plastics – PET and HDPE. First the plastic must be sorted, then any contaminates removed. The plastic is either melted down directly and moulded into a new shape, or shredded into flakes then melted down before being processed into granulates.
Metal cans:
There is a high recycling rate for metal cans in the UK, with aluminium recycling and steel cans being the most common items. Metal can be recycled indefinitely, and aluminium cans use just 5% of the energy needed to produce them from scratch and only release 5% of the amount of greenhouse gases. In addition, it is the easiest material to extract and separate from the other recyclables. In the treatment plant the aluminium is sorted and cleaned ready for melting into molten aluminium, which removes any coatings and inks that may be present.
The recycling plant the glass and then melts it.
Recycling paper uses energy than producing it from scratch.
The recycling of some plastics is not always possible due to a lack of special recycling plants.
Molten aluminium is aluminium that has been .
Quellen:
https://en.wikipedia.org/wiki/Recycling, Okt 2016
https://en.wikipedia.org/wiki/Recycling_in_the_United_Kingdom, Okt 2016
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