内容摘要：Julio Salas Gutiérrez, the Chilean Undersecretary of Fisheries and Aquaculture, tells the BBC that the government is working to remove fish farms from the national parks.

Julio Salas Gutiérrez, the Chilean Undersecretary of Fisheries and Aquaculture, tells the BBC that the government is working to remove fish farms from the national parks.

"I feel like a drifting duckweed tossed in wind and storm," she said, using a common Chinese expression used to describe feeling both uncertain and helpless.She had been hopeful because she already had the acceptance letter. And she thought she had narrowly escaped the bombshells in recent days.

First, Donald Trump's administration moved to end, a move that has since been blocked in court. And then it said it hadfor all foreign students.

But now, Chen is ready for plan B. "If I can't get the visa eventually, I'll probably take a gap year. Then I'll wait to see if things will get better next year."A valid visa may still not be enough, she adds, because students with visas could be "stopped at the airport and deported".

"It's bad for every Chinese student. The only difference is how bad."

It has been a bleak week for international students in the US - and perhaps even harder for the 280,000 or so Chinese students who would have noticed that their country has been singled out.They drew their conclusion after reviewing the most recent studies of how the ice sheets are changing - and how they have changed in the past.

But the scientists stress that every fraction of a degree of warming that can be avoided would still greatly limit the risks.The world's current trajectory puts the planet on course for nearly 3C of warming by the end of the century, compared with the late 1800s, before humans began burning large amounts of planet-heating fossil fuels. That's based on current government policies to reduce carbon emissions from fossil fuels and other polluting activities.

But even keeping to 1.5C would still lead to continued melting of Greenland and Antarctica, as temperature changes can take centuries to have their full impact on such large masses of ice, the researchers say."Our key message is that limiting warming to 1.5C would be a major achievement - it should absolutely be our target - but in no sense will it slow or stop sea-level rise and melting ice sheets," said lead author Prof Chris Stokes, a glaciologist at Durham University.