We have just entered a new decade, a decade where every month and every day will be absolutely crucial in deciding what the future will look like. Towards the end of January, chief executives, investors and policymakers will gather in Davos for the 50th anniversary of the World Economic Forum.

Young climate activists and school strikers from around the world will be present to put pressure on these leaders.

We demand that at this year’s forum, participants from all companies, banks, institutions and governments immediately halt all investments in fossil fuel exploration and extraction, immediately end all fossil fuel subsidies and immediately and completely divest from fossil fuels.

We don’t want these things done by 2050, 2030 or even 2021, we want this done now – as in right now.

We understand and know very well that the world is complicated and that what we are asking for may not be easy. But the climate crisis is also extremely complicated, and this is an emergency. In an emergency you step out of your comfort zone and make decisions that may not be very comfortable or pleasant. And let’s be clear – there is nothing easy, comfortable or pleasant about the climate and environmental emergency.

Quick Guide What is Davos 2020? Show Davos is a Swiss ski resort now more famous for hosting the annual four-day conference for the World Economic Forum. For participants it is a festival of networking. Getting an invitation is a sign you have made it – and the elaborate system of badges reveals your place in the Davos hierarchy. The meeting is sponsored by a huge number of international banks and corporations.

For critics, “Davos man” is shorthand for the globe-trotting elite, disconnected from their home countries after spending too much time in the club-class lounge. Others just wonder if it is all a big waste of time. The 2020 meeting is being advertised as focusing on seven themes: Fairer economies, better business, healthy futures, future of work, tech for good, beyond geopolitics and how to save the planet. Young climate activists and school strikers from around the world will be present at the event to put pressure on world leaders over that last theme.

Young people are being let down by older generations and those in power. To some it may seem like we are asking for a lot. But this is just the very minimum of effort needed to start the rapid sustainable transition. The fact that this still – in 2020 – hasn’t been done already is, quite frankly, a disgrace.

Yet, since the 2015 Paris agreement, 33 major global banks have collectively poured $1.9tn (£1.5tn) into fossil fuels, according to Rainforest Action’s report. The IMF concluded that in 2017 alone, the world spent $5.2tn subsidising fossil fuels. This has to stop.

The world of finance has a responsibility to the planet, the people and all other species living on it. In fact, it ought to be in every company and stakeholder’s interest to make sure the planet they live on will thrive. But history has not shown the corporate world’s willingness to hold themselves accountable. So it falls on us, the children, to do that. We call upon the world’s leaders to stop investing in the fossil fuel economy that is at the very heart of this planetary crisis. Instead, they should invest their money in existing sustainable technologies, research and in restoring nature. Short-term profit should not trump long-term stability of life.

A coal fired power plant: ‘Since the 2015 Paris agreement 33 major global banks have poured £1.5tn into fossil fuels.’ Photograph: John Giles/PA

The theme of this year’s gathering in Davos is “stakeholders for a cohesive and sustainable world”. According to the forum’s website, leaders will meet to discuss ideas and improve our global progress on climate change. Our request to them is perhaps not so far-fetched considering that they say they understand and prioritise this emergency. Anything less than immediately ceasing these investments in the fossil fuel industry would be a betrayal of life itself. Today’s business as usual is turning into a crime against humanity. We demand that leaders play their part in putting an end to this madness. Our future is at stake, let that be their investment.

• Greta Thunberg is a 17-year-old environmental campaigner from Stockholm, Sweden. This article was co-written with youth climate activists Jean Hinchliffe, Australia; Danielle Ferreira de Assis, Brazil; Joel Enrique Peña Panichine, Chile; Robin Jullian, France; Luisa Neubauer, Germany; Licipriya Kangujam, India; David Wicker, Italy; Julia Haddad, Lebanon; Oladosu Adenike, Nigeria; Iqbal Badruddin, Pakistan; Arshak Makichyan, Russia; Holly Gillibrand, Scotland; Alejandro Martínez, Spain; Isabelle Axelsson, Sweden; Sophia Axelsson, Sweden; Ell Jarl, Sweden; Mina Pohankova, Sweden; Linus Dolder, Switzerland; Vanessa Nakate, Uganda; Tokata Iron Eyes, USA