This figure could fall even further due to the dramatic drop in the price of renewable energy technologies, including photovoltaics and lithium-ion batteries.
We are far, of course, from being able to declare that the battle against climate change is won. Even a warming of 2.5 degrees, compared to 1.2 today, represents a dramatic change for humans and their environment. However, it allows us to be-cautiously-much more optimistic than we were only a few years ago. This is thanks to both the soaring prices of fossil fuels and the efficiency of renewable energies: recent studies have shown that up to 90% of the world's population lives in an area where renewable energies would be cheaper than fossil fuels. The installation of renewable energy worldwide keeps increasing. China alone has installed more renewable energy capacity that the rest of the world combined. Beijing is followed by the EU (with an average annual growth of 44Twh in the EU over the last two years), and soon by the US, following the adoption of the historic Inflation Reduction Act.
In this mix of negative and positive signs, what can COP27 deliver? And what are the main challenges to be addressed by this conference?
What is a COP and what is being discussed?
Conferences of the Parties have been held annually since the 1992 Rio "Earth Summit". Using a multilateral format, these conferences bring together countries (198) and non-state actors negotiating rules and measures to work toward solutions to climate change. In 2015, nations gathered in Paris for COP21 agreed to the first universal international agreement to tackle climate change, called the Paris Agreement.
The Paris Agreement organizes a bottom-up structure, committing countries to self-determine their contribution (called Nationally Determined Contribution, NDC) to avoid exceeding 1.5 degrees-or much less than 2 degrees-of warming compared to pre-industrial times. The agreement set in stone the concept of common but differentiated responsibilities (CBDR), indicating that developed countries have more responsibility for the amount of GHGs already accumulated in the atmosphere than developing countries and, therefore, must do more and faster.
The Paris Agreement is based on three pillars: climate change mitigation, climate change adaptation, and, finally, loss and damage:
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