An environment is a collection of all living things in a specific area of land or water. It can also include space and celestial bodies. Examples of environments are wetlands, deserts, grasslands, forests, and oceans. In this fascinating series, hot environments are explored and how man interacts with them. Desert: Deserts cover one third of the world's land mass. Encroaching deserts are estimated to affect 250 million people. Explore how many who have always lived in some of the driest locations have developed a range of unique skills designed to help cope with the 'arid' life. Tropic: The tropics of the world feature the broadest range of plant and animal life. Tropical forests use intense sunlight to replenish the atmosphere with oxygen and water vapor. Eco-tourism initiatives are being embraced in order to preserve this delicate environment. Drought: When prolonged droughts occur, the consequences for people, wildlife and plants alike are extreme. Typically drought affected areas, such as in Africa, are suffering severe drought brought on by both natural and man-made conditions. How can we prevent them? Sun: The sun provides light, warmth and energy that is crucial to our existence. Technological advancements to better understand the Sun, such as the Solar & Heliospheric Observatory (SOHO), are shown.