At the same time railway accidents sometimes result in the heaviest environmental pollution with tons of transported chemical products. accidents at oil and petroleum product pipelines are often accompanied by atmospheric emissions of* thousands tons of oil and petroleum products, which is especially hazardous for resource extracting northern regions of* Russia with their very sensitive eco-system.
Noxious emissions and other key environmental indices are given in Table 5.
Table 5.
Key environmental characteristics of* various transportation systems (passenger flow - more than
1,000 passenger/hour, freight flow - 1,000 tons/hour)