The Issue 2/2015 of CSE has been published shortly after the United Nations Climate Change Conference (COP21) in Paris. With the agreement to be signed in New York starting from April 2016, the approximately 200 signatory countries are going to pledge to limit the rise in average global temperature of 1.5 degrees through the direct commitment of the majority of countries actually responsible for greenhouse gas emissions. However, national emission limits have not been established yet.
According to United Nations experts, the promised cuts are not sufficient. To ensure that the overall goal is met, the agreement stipulates that every five years, starting in 2018, progress in reducing emissions by all countries will be reported. The first of such reports will be undertaken in 2023. 
As the authors of the editorial in this issue assert, the Conference was closed satisfactorily if it is considered in terms of a “one-step-at-a-time” approach. But the urgency to find truly effective solutions to global warming and its related climate change requires that, over time, the steps become increasingly larger and more determined. 
The editorial in this issue concerns environmental sustainability and security in relation to climate change and natural risks. Organized by topic, the articles following the editorial are summarized here.

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