Since then, tens of thousands of children in Belgium, Germany, Sweden, Switzerland and Australia have been inspired to make their own demonstrations.
In London, 1
"Many of us are very good, obedient students, but when it comes to climate change, that is really important," she says.
"The youngsters of our time tend to be pushed to one side quietly, but as far as climate change is concerned, we will have to pay for the mistakes of the older generation"
"It really scares me."
Part of the British student climate network, 15-year-old Scarlett of Suffolk, says the group has a detailed list of requests.
"We urge the government to listen to us and we will continue to make noise until they do it."
"There can be no more to change behavior;
Scarlett says she was a vegetarian since she was six years old, wearing second-hand clothes and avoiding plastic bags, and also wearing a reusable straw.
Hundreds of young protesters chanted for a climate of justice in Cambridge, carrying posters with slogans, including "No Planet B," and "When the Children Been Elderly".
Ten-year-old Zahari, who attends with his mother, says he thinks climate change is more important than lessons.
He said, "People just have to change their way, because we do not want the world as it is now."
"We just want to realize people. We talked about it in our class, so we just came. "
In Wales, hundreds of elementary and high school students went to the Welsh Assembly in the Gulf of Cardiff. leave at work should only be given in exceptional circumstances.
Energy Minister Claire Perry said he supported the action.
She told the BBC: "I suspect that if it happens 40 years ago, I'll be there as well."
to the young people in the UK who are highly educated on this issue and feel very strong – quite right – that we need to take action because their generation will suffer the consequences. "