Light bulbs, refrigerators, gas boilers, steam engines or electric motors: all of these devices make the uses of energy familiar. But how do they meet our needs for light, heat or driving force? The transition from needs to uses can be more or less efficient for technical reasons and result in varying demands with the incomes of consumers and the prices of various energy sources.
In the space of a few decades, access to water has become one of the challenges that humanity must rapidly overcome. Yet water is abundant on a global scale: the oceans are an inexhaustible reserve provided that salt and water are separated. Other reserves, such as brackish water that is
BANDELIER Philippe- Niveau de lecture
Climate change is definitely a huge challenge for the 21st century. Models in energy economics show that efficiency gains through energy productivity improvement, technical change and technological innovations towards lower carbon technologies will not be sufficient to achieve the ultimate objective of the United Nations Framework Convention on Climate Change
BLANCHARD Odile- Niveau de lecture