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  1. Deterioration of Forests
  2. Destruction of Automotive coating.
  3. Reduction of Photosynthetic rate
  4. Increase methane emission from wetlands.
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Option 4 : Increase methane emission from wetlands.

Wetland soils also contain sulfur-loving archaea, which are single-celled organisms that use sulfur for energy production. They compete with the methane producing microbes. In areas where there is a significant amount of acid rain, scientists have shown that these sulfur archaea out-compete the methane-producing microbes, thereby decreasing the methane output in these areas significantly.
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Related Questions

In the question below, are given a statement followed by three courses of actions numbered I, II and III. On the basis of the information given, you have to assume everything in the statement to be true, and then decide which of the following suggested courses of actions logically follow(s) for pursuing. Statement: Starting October, all new cars will have pedestrian safety features, including new design of the bonnet, to reduce impact on pedestrians during accidents. Advanced safety features are needed in all vehicles in India as vehicle safety cannot be confined to luxury vehicles only. Around 1.5 lakh people are killed in road accidents every year in the country, nearly 60% of them are pedestrians.  Courses of action: I. The government has set a target to reduce the number of road deaths by half in the next two years. The ministry of road transport and highways has been issuing new safety standards for the automobiles along with eliminating the black spots on national highways.  II. By next month, all new cars will have pedestrian safety feature, including new design of the bonnet, to reduce impact on pedestrians during accidents.  III. Ministry of road transport and Highways is planning to implement all safety features in vehicles with active support of vehicle manufacturers. Electronic stability control (ESC) and autonomous emergency braking (AEB) will be incorporated in new vehicles by 2022.?
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