The difference between the 1.5 degree Celsius target and the 2 degree Celsius target refers to the difference in the desired level of global temperature increase as outlined in climate change goals and agreements.
The targets are often referred to as global temperature targets and are associated with limiting the average global temperature rise relative to pre-industrial levels. Here's a breakdown of the difference between the two targets:
1.5 Degree Celsius Target: The 1.5 degree Celsius target refers to the goal of limiting global warming to an increase of no more than 1.5 degrees Celsius above pre-industrial levels. It was prominently highlighted in the 2015 Paris Agreement, where nations agreed to pursue efforts to limit global temperature rise to well below 2 degrees Celsius while striving to keep it below 1.5 degrees Celsius.
The 1.5 degree Celsius target is considered more ambitious compared to the 2 degree Celsius target. It recognizes the greater risks and impacts associated with a higher level of warming and aims to minimize those risks. It emphasizes the need for stronger and more immediate actions to reduce greenhouse gas emissions and transition to a low-carbon economy.
2 Degree Celsius Target: The 2 degree Celsius target refers to the goal of limiting global warming to an increase of no more than 2 degrees Celsius above pre-industrial levels. This target was widely discussed and recognized as a threshold beyond which the impacts of climate change are expected to become significantly more severe and irreversible.
The 2 degree Celsius target was a reference point for climate discussions before the 1.5 degree Celsius target gained prominence. It was considered a threshold to avoid dangerous climate change, and efforts were made to limit global temperature increase to below this level. However, as the scientific understanding of climate impacts progressed, there was increased recognition that even a 2 degree Celsius increase would have significant adverse effects.
In summary, the difference between the 1.5 degree Celsius target and the 2 degree Celsius target is the level of warming that is considered acceptable in terms of mitigating the impacts of climate change. The 1.5 degree Celsius target is more ambitious and aims to limit global warming to a lower threshold, recognizing the heightened risks and consequences associated with higher levels of warming.