Step 1 : Introduction to the question "5. The polar bear is now classified as a 'vulnerable species'. What is widely considered to be the greatest threat to their survival?"
...1. Hunting 2. Global warming 3. Land development 4. Pollution The major danger of global warming is starvation and malnutrition secondary to their habitat loss. Polar bears hunt seals on a platform of sea ice, the rising temperatures are causing thinner ice which makes it much harder for the bears to get to the seals. The ice is also melting much earlier in the year which means they have to go back to shore before they have enough fat reserves to survive the summer, they also have to swim longer distances to get there which uses up even more of their energy reserves. All of this malnourishment also leads to lower reproduction rates and lower survival rates for those cubs that are born. Polar bears have black skin and white fur, although the outer layer of guard hairs are actually transparent.
Step 2 : Answer to the question "5. The polar bear is now classified as a 'vulnerable species'. What is widely considered to be the greatest threat to their survival?"
Global warming:
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