Transitioning to renewable energy is the key to securing humanity’s survival, as “without renewables, there can be no future”, according to UN Secretary-General António Guterres, ahead of the International Day of Clean Air for Blue Skies, marked on 7 September.

Renewable technologies like wind and solar power are, in most cases, cheaper than the fossil fuels that are driving climate change, but the world needs to prioritize the transformation of energy systems to renewable energy.

The Climate Ambition Summit, scheduled for 20 September at UN Headquarters in New York, will consider how to accelerate this transformation.

Here are five ways that acceleration could happen:

1. Shift energy subsidies from fossil fuels to renewable energy

Fossil fuel subsidies are one of the biggest financial barriers hampering the world’s shift to renewable energy.

The UN Secretary-General has consistently called for an end to all international public and private funding of fossil fuels, one of the major contributors to global warming, calling any new investments in them “delusional”.

“All actors must come together to accelerate a just and equitable transition from fossil fuels to renewables, as we stop oil and gas expansion and funding and licensing for new coal, oil, and gas,” he said.

The International Monetary Fund (IMF) revealed that $5.9 trillion was spent on subsidizing the fossil fuel industry in 2020 alone. This figure includes subsidies, tax breaks, and health and environmental damages that were not priced into the initial cost of fossil fuels.

That’s roughly $11 billion a day.

Shifting subsidies from fossil fuels to renewable energy leads to a reduction in their use and also contributes to sustainable economic growth, job creation, better public health, and more equality, particularly for the poorest and most vulnerable communities around the world.

2. Triple investments in renewables

An estimated $4 trillion a year needs to be invested in renewable energy until 2030 in order to reach net-zero emissions by 2050. Net zero is the term which describes achieving the balance between carbon emitted into the atmosphere and the carbon removed from it.

Investment in renewables will cost significantly less compared to subsidizing fossil fuels. The reduction of pollution and climate impact alone could save the world up to $4.2 trillion per year by 2030.

The funding is there, but commitment and accountability are needed, particularly from global financial systems. This includes multilateral development banks and other financial institutions, which must align their lending portfolios towards accelerating the renewable energy transition.

“Renewables are the only path to real energy security, stable power prices and sustainable employment opportunities,” the UN chief said.

He has further urged “all governments to prepare energy transition plans” and encouraged “CEOs of all oil and gas companies to be part of the solution”.

3. Make renewable energy technology a global public good

For renewable energy technology to be a global public good, meaning available to all and not just to the wealthy, efforts must aim to dismantle roadblocks to knowledge-sharing and the transfer of technology, including intellectual property rights barriers.

Essential technologies such as battery storage systems allow energy from renewables to be stored and released when people, communities, and businesses need power.

When paired with renewable generators, battery storage technologies can provide both reliable and cheaper electricity to isolated grids and off-grid communities in remote locations, for example, in India, Tanzania, and Vanuatu.

4. Improve global access to components and raw materials

A robust supply of renewable energy components and raw materials is a game changer. More widespread access to all the key components and materials is needed, from the minerals required for building wind turbines and electricity networks to elements for producing electric vehicles.

The UN’s International Seabed Authority is currently working with its Member States on how to exploit such abundant mineral resources in international waters as those crucial for manufacturing batteries while ensuring the effective protection of the marine environment from harmful effects that may arise from deep-seabed-related activities.

It will take significant international coordination to expand and diversify manufacturing capacity globally. Greater investments are needed, including in people’s skills training, research and innovation, and incentives to build supply chains through sustainable practices that protect ecosystems.

5. Level the playing field for renewable energy technologies

While global cooperation and coordination is critical, domestic policy frameworks must urgently be reformed to streamline and fast-track renewable energy projects and catalyse private sector investments.

Technology, capacity, and funds for renewable energy transition exist, but policies and processes must be introduced to reduce market risks to both enable and incentivise investment, while simultaneously preventing bottlenecks and red tape.

Nationally determined contributions, or countries’ individual action plans to cut emissions and adapt to climate impacts, must set renewable energy targets that align with the goal of limiting the increase in global temperatures to 1.5°C (2.7°F) above pre-industrial levels.

To achieve this, it is estimated that the share of renewables in global electricity generation must grow from 29 per cent today to 60 per cent by 2030.