Why is the tundra the second most deadliest environment?

Threats

• The melting of the permafrost as a result of global warming could radically change the landscape and what species are able to live there.
• Ozone depletion at the North and South Poles means stronger ultraviolet rays that will harm the tundra.
• Air pollution can cause smog clouds that contaminate lichen, a significant food source for many animals.
• Exploration of oil, gas, and minerals and construction of pipelines and roads can cause physical disturbances and habitat fragmentation.
• Oil spills can kill wildlife and significantly damage tundra ecosystems.
• Buildings and roads put heat and pressure on the permafrost, causing it to melt.
• Invasive species push aside native vegetation and reduce diversity of plant cover.