This gallery of 40 winning entries from the 2007 international photo and video contest showcases the intricate link between the environment and public health. This year the focus of the annual contest was on health and environment, as part of WHO's efforts to raise awareness about the importance of healthier environments.

The 2007 entries include positive images that highlight the beneficial effects of safe and healthy environments: children playing in healthy, supportive and enabling environments; safe water; clean air, and a stable climate etc.

In contrast, other images paint the grim reality of our environment today: showing the hazards of shipbreaking; children drinking arsenic-laden water; people breathing in thickly polluted air; health risks for workers at garbage dumps etc.

The winning entries from each of the four categories (black and white, color, digiart and video) are available to view on this World Health Organization (WHO) webpage