There is little doubt    1    Earth is getting warmer and warmer, which has a bad impact     2    Earth’s ecology. There is strong and comprehensive     3    　(evident) that the rise in temperature has led     4    an increase in extreme weather and     5     (nature) disasters worldwide, not only causing serious damage, but also     6    　(cost) human lives.     7     (continue) greenhouse gas emissions will result     8     further warming and long­lasting changes to the global climate. This requires the attention of people all over the world. Governments need to consider     9     (make) policies and taking appropriate actions and     10    　(measure) to reduce greenhouse gas emissions. We as individuals can also reduce our “carbon footprint”．

A new study     1     (publish) by the Rapid Transition Alliance has revealed that climate change will     2     (threat) global sports events over the next three decades. This group     3     (monitor) climate change, development and global issues on a daily basis. Researchers said that nearly all sports would be affected in the future by     4     they called “an accelerating (加速的) climate crisis”. They highlighted how the weather had already     5     (direct) affected major sports events. Bushfires in Australia made playing conditions     6     (danger) at the Australian Tennis Open. They predicted that fires, floods, heat waves and rising sea levels would cause greater damage.

The Rapid Transition Alliance urged the sports industry     7     (become) carbon-neutral (碳中和的). It said that the carbon emissions from sports events worldwide are equal     8     those produced by a medium-sized country. The study blamed the sport for its inaction. It said, “Making     9     carbon-zero world the common-sense priority (优先) of the sports world would make a huge     10     (contribute) to making it the common-sense priority of all politics.”

Polar bears live in a special environment that is too cold for most animals. For much of the year, they live and hunt on the     1    (freeze) Arctic sea ice. Nature has prepared them for the cold conditions but nothing has prepared them for the danger     2     threatens their only home.

The polar bears’ world is melting. Polar bears     3    (suffer) in a warmer world are in danger. Studies show that the polar ice     4    (decrease) by 9. 8% every 10 years since 1979. At present, about 20,000 to 25,000 polar bears live in the Arctic. Polar bears depend     5     the sea ice for their     6    (survive). “The sea ice is more than just the platform that the bears walk on,” says Andrew Derocher, who studies North American polar bear populations, “Without     7    , they can’t exist.”

Some melting and refreezing of the sea ice is     8    (nature). But in a warmer world, these cycles speed up, and bears have less time to hunt.

    9    (normal), they have three months in the spring when they gain more weight and the extra fat is used later, when the bears are not actively hunting.

So it is important     10    (protect) the environment and keep the ecological balance.