World Environment Day is celebrated every year on June 5th, on the anniversary of the United Nations Conference on the Environment in Stockholm (1972), at which the United Nations Environment Program (UNEP) was adopted.

By marking World Environment Day, UNEP seeks to highlight major environmental issues and encourage understanding of the role and responsibilities in thinking about sustainable development. This day is celebrated in more than 140 countries around the world with the aim of encouraging citizens to behave responsibly to preserve the planet through an active role in sustainable and balanced development.

This year's World Environment Day is held under the slogan "Time for Nature" and reflects the desire and need of people to turn to nature and live in harmony with nature.
According to recent scientific data, nature is increasingly threatened by land use change, agricultural activities, overexploitation of plant and animal resources, climate change and the negative impact of invasive alien species.

Biodiversity loss and ecosystem collapse pose are of the greatest threats to humanity in the next decade. Therefore, any investment in biodiversity conservation pays off many times over, so, for example, wetland conservation can save insurance companies more than 50 billion euros a year in flood prevention and mitigation.

Following this, the "EU Biodiversity Strategy until 2030-Bringing nature back to our lives" was adopted, which sets goals that will ensure that the negative trends of biodiversity loss at the European Union level are stopped. In this way, the European Union and its Member States will be world leaders in biodiversity conservation.

On the occasion of the World Environment Day, the Croatian Ministry of Environmental Protection and Energy issued a brochure "Environment in the palm of your hand I - 2020".