轻松英语阅读：有史以来最炎热的夏天
Last year the world was hot like never before. That is according to international weather researchers. They say it was due to climate change.
Weather researchers from the United States and Switzerland measured the temperatures around the world. They compared the temperatures with previous years. The conclusion: 2016 set a new heat record for the world. The scientists say that this climate change was caused by human activity.
In 2015, many countries gathered in Paris and adopted a treaty to protect the climate. The countries there agreed that we should not let the earth’s temperature go up more than 1.5 degrees Celsius. These new measurements show that this will be very difficult.
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