Need to see wgich options are more enviromnetally heatthy
need to analyse 3 situations
2. Compare the use of virgin paper and recycled paper. Compare from an environmental point of view the use of recycled paper and the use of paper obtained from paper pulp. The recycled paper has been obtained from paper wastes transported in 16-t trucks from a distance of 1000 km. The total emissions of carbon dioxide, CO2, and the generated solids in kg of them are used as comparison parameters. It is desirable to compare the derived effects of the following two scenarios:
• purchasing a 400-g pack of new writing paper at the corner stationery shop • driving to buy a similar pack of recycled paper at an establishment 1 km away.
2)3. Compare the use of paper towels and an air dryer to drying the hands. Compare environmentally the use of paper towels for drying hands and the use of a hand-dryer supplied with electricity from a gas thermal power plant or from an eolic power plant. The considered comparison parameters are the emissions of carbon dioxide, CO2, and sulfur dioxide, SO2.
Suppose that the weight of a paper towel is 7 g and that the electric hand-dryer is 2000 W and works for 30 s. With these data, determine the best way, from an environmental point of view, to dry the hands. The ELs related to the paper and the use of electricity
3)4. Compare the use of two different plastics: PP and PVC. A company endeavors to compare the environmental impact due to the industrial use of two polymers: polypropylene (PP) and polyvinyl chloride (PVC) as raw material for manufacturing piping. It considers it necessary to take into account two variables: the raw material and its transport. Two alternatives are supposed:
a) Buying PP piping from a distributor who receives the product by train from a factory 1000 km away and uses a van to deliver the product to a consumer who is 200 km from the distributor
b) Buying PVC tubes from a distributor who acquires the product by a 16-t truck from a factory 700 km away and uses a van to deliver the product to a consumer who is 50 km from the distributor
To compare the environmental behavior of each product, the company makes use of three parameters: kilograms of consumed oil, GWP measured as kilograms of equivalent CO2, and acidification (acid potential, AP) measured as kilograms of equivalent SO2.
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