We have known about climate change for d    1    . There is little d    2     that Earth is getting warmer and warmer (see the graph). A warming ocean and atmosphere along with m    3     ice and rising sea levels provide evidence of a dramatic change in the global climate.

In 2013, a lot of people were s    4     by a news photo of a dead polar bear that was found on Norway’s Arctic island of Svalbard. A    5     to the scientists who found its dead body, all that remained of the polar bear was “skin and bones”. An expert who has studied polar bears for many years said that from the    6    of its dead body, the bear appeared to have s    7     and died. Experts claimed that low sea-ice levels c    8     by climate change meant the bear could not hunt seals as before, so it had to travel greater distances in order to find food. This alarming case s    9     how the increase in temperature had an i    10     on Earth’s ecology.