From the perspective of human time, very little changes on 'the surface of Earth. From the perspective of geologic time, the period from Earth's beginning more than 4.5 billion years ago to the pres• ent day, however, the surface of the planet is in constant motion, being reshaped over and over. The constructive and destru…
In the technological world of the twenty-first century, few peo• ple can truly imagine the challenges faced by prehistoric people as they tried to cope with their natural environment. Thousands of years ago life was a daily struggle to find, store, and cook food, stay warm and clothed, and generally …
Alternative Energy offers readers comprehensive and easy-to-use information on the development of alternative energy sources.
• Although the set focuses on new or emerging energy sources, such as geothermal power and solar energy, it also discusses existing energy sources such as those that rely on fossil fuels. Each volume begins wi…
Alternative Energy offers readers comprehensive and easy-to-use information on the development of alternative energy sources. Although the set focuses on new or emerging energy sources, such as geothermal power and solar energy, it also discusses existing energy sources such as those that rely on fossil fuels. Each volume begins with a gen…
In articles and maps indicating disputed geopolitical. Boundaries and territories, the attribution of sovereignty or administrative subordination to any specific area does not imply recognition of the status claimed by an aministering power.
Perkembangan dalam sektor pertambangan selama 1987 tetap masih dirasakan berat, meskipun ada berbagai hal yang menggembirakan yang menunjukan akan adanya peningkatan kegiatan. Temuan dan pengembangan lapangan minyak dan gas baru terus berlangsung, demikian pula usaha pengebangannya, lebih banyak lagi perusahaan asing dan suasta nasional yang menaru…