Ocean acidification is a process by which the pH of the ocean decreases due to the absorption of carbon dioxide from the atmosphere.

The burning of fossil fuels releases carbon dioxide into the atmosphere, which is then absorbed by the ocean, leading to ocean acidification.

Ocean acidification makes it more difficult for marine organisms to build their shells and skeletons because it reduces the availability of carbonate ions in the water.

Coral reefs are among the most affected marine ecosystems by ocean acidification because corals rely on carbonate ions to build their skeletons.

Ocean acidification can lead to a variety of health problems in humans, including respiratory problems, cardiovascular problems, and neurological problems.

Reducing ocean acidification requires a combination of efforts, including reducing the burning of fossil fuels, increasing the use of renewable energy sources, and planting more trees.

The Paris Agreement is an international agreement within the United Nations Framework Convention on Climate Change (UNFCCC) dealing with greenhouse gas emissions mitigation, adaptation, and finance starting in the year 2020.

The goal of the Paris Agreement is to limit global warming to well below 2 degrees Celsius, preferably to 1.5 degrees Celsius, compared to pre-industrial levels.

As of April 2023, 197 countries have signed the Paris Agreement.

China is the largest emitter of greenhouse gases, accounting for approximately 28% of global emissions.

The Intergovernmental Panel on Climate Change (IPCC) is a United Nations body for assessing the science related to climate change.

The role of the IPCC is to provide policymakers with regular assessments of the scientific basis of climate change.

The IPCC publishes its assessment reports every five years.

The latest IPCC assessment report is AR6, which was published in 2021.

Some of the key findings of the AR6 report include: Human influence has warmed the atmosphere, ocean, and land; Global warming is likely to reach 1.5 degrees Celsius by 2040; Climate change is already affecting every region of the globe.