I am going to start and talk about Ecology and nutrient cycles.

As all of you know, global warming has caused a great and huge effect on the ecosystem. More and more glaciers and ice caps are dimishing effectively as there is a rise in temperatures. According to many reports, by 2040, the Artic could be ice-free. This has created many problems for animals living in the Artic like polar bears and penguins. The polar bears have to swim and swim till they can find huge ice caps where they can stay on for a few weeks before moving on to find others. They also swim around to find food.

While searching for ice caps, the polar bears may drown as they become tired when they swim huge distances. Although polar bears are strong swimmers, they are adapted for swimming close to the shore. Their sea journeys leave them them vulnerable to exhaustion, hypothermia or being swamped by waves. Such drownings are becoming widespread across the Arctic, an inevitable consequence of the doubling in the past 20 years of the proportion of polar bears having to swim in open seas.