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1. As a result of global warming my environmentally vulnerable country has been suffering the melting of permanently frozen soil and other climate problems.

2. Glacier experts have conducted investigations in the area and others have studied railways built on frozen soil in Russia and Canada.

3. By melting icy soil in one of its lab instruments, the robot confirmed the presence of frozen water lurking below the Martian permafrost.

4. A section of 550 km of the transmission line will be built on frozen soil that could become unstable due to temperature changes.

5. The soil has frozen to a depth of more than 20 centimeters, which means the snow is unable to soak into the ground below.