Over the last decades tourism has grown enormously and travel distances have increased. Land occupied by tourism related activities is growing significantly, in certain areas, and this trend is expected to continue, at the expense of land previously used in other activities. According to the...

Economic development increases the demand for energy. This is true for countries at all income levels, although as economic growth progresses, the demand tends to increase more in the low- and middle-income countries than in high-income ones. But energy remains a key ingredient for economic...

"With growing concerns about the security, cost, and ecological consequences of energy use, people around the world are becoming more conscious of the systems that meet their daily needs for food, heat, cooling, light, transportation, communication, waste disposal, medicine, and goods. Powering...