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Option 2 environmental pollution scenario review and summary

On the other hand, N2O emission is favored in an alternate wetting and drying scenario, which is mostly evident in upland paddy and aerobic rice Houghton, et al. Incorporation Table 1 of CRs for several months before flooding, creates an aerobic situation and minimum flooding reduced CH4 emissions, whereas the effect is reversed when fresh CRs are added as a source to provided organic matter to soil and continuous flooding is maintained Yan et al.

Environmental pollution scenario review and summary

Alternatively, to reduce CH4 emissions in flooded systems, CRs should be added into the soil well before flooding e. Some studies proved that less CH4 was emitted when CRs were used as mulch than when they were incorporated into the soil Table 1 Harada et al. However, water management plays a key role in CH4 emissions in lowland tropical rice-paddies. Residue management rarely affects the N2O emission in continuously flooded lowland rice.

  1. In the scenario I did not chose the ideal measures for waste disposal and cutback in waste at source, only four out of the five measures I chose are considered effective. I was able to make decisions that benefited the town and made steps towards the goal of maintaining the environmentally-friendly title.
  2. In developed countries, also, considerable water mixing often occurs during treatment and distribution, so that water quality is relatively uniform across large areas and populations.
  3. Exposure can take place in many different ways.
  4. Choose 4 of the 7 measures given below based on popular acceptance, budget use, and pollution reduction.
  5. Sci 256 week 4 environmental pollution option 1. Assessment of impacts of options to reduce the use of single-use plastic carrier bags 32 option 1 — baseline scenario 75 other environmental pollution.

However, fallow, mid-season drainage and harvest-drainage is likely to alter the N2O formation and emission. Peaks of N2O emissions are generally observed just after N-fertilizer application and rainfall, irrespective of crop residue addition both time and amount Bhattacharyya et al.

  • They also vary greatly between different pollutants and environmental media, because of the different transportational behaviours that are involved;
  • In the scenario I did not chose the ideal measures for waste disposal and cutback in waste at source, only four out of the five measures I chose are considered effective;
  • You will choose from the following options;
  • Although it can be expensive, recycling also generates revenue through creation of jobs;
  • Environmental Pollution Assignment Options Option 2:

There is no consistent trend regarding the effect of residue removal or return Table 1 on N2O emissions in flooded tropical rice lands. In fact, N2O emission are often affected by a soil water regime than the residue incorporation and surface mulch Harada et al.

For example, the addition of high C: N ratio residues like wheat straw can decrease N2O emissions because of a relatively higher N immobilization, as compared to a low C: N residue like mustard cake that can increase emissions Zou et al.

  • Make decisions on the optimal measure for addressing the pollution management issue;
  • Even though this measure does not score high with residents on the acceptance level report by Stormcades, this measure is cost effective and environmentally sound.

Methane is produced during biomass burning in field due to incomplete combustion. As huge piles of dried crop residues start burning in the field at a time there is scarcity of oxygen supply during the process because the rate of burning is much faster than that of supply of oxygen to the residue heap from the surrounding. As a result, there is a deficiency of oxygen, which triggers an incomplete combustion of residues resulting in the methane production and subsequent emission.

In Thailand the open burning of rice residues is one of the major causes of air pollutants and GHG emissions. The burning of rice residues does not only happen in India and Thailand; it is one of the management methods commonly found in many other countries like China and Philippines Cheewaphongphan et al. The burning of rice residue not only emits GHGs, but also pollutants like carbon monoxide COparticulate matter PMand polycyclic aromatic hydrocarbons PAHs due to incomplete combustion processes.

In a broad sense, two methods can be followed to manage the open burning of RRs: The retention and subsequent incorporation of RRs into the soil is a sustainable ecofriendly management that gradually enhances soil C and nutrient status.

Option 1 environmental pollution scenario review and summary

However, at the same time, this practice increases weed carryover, soil compactness, and GHG emissions. The addition of RR or CR increases the organic matter content and subsequently the organic carbon content in the soil.

  1. There is also a concern that insects and other animals might eat the plants and could risk the possibility of introducing the toxins into the food web.
  2. Sci 256 week 4 environmental pollution option 1.
  3. Again, this makes exposure assessment difficult, without the ability to collect data on water quality for individual wells. Clean energy and pollution reduction act senate bill 350 study.

Soil organic carbon acts as an excellent binding agent and helps to form a stable soil aggregate and improve soil structures. At the same time, soil organic carbon increases the bulk density of the soil, making it aerobic and therefore reducing methane production.