The present paper is approaching the energy efficiency topic from the viewpoint of its trends and influence factors, in the context of requirements, criteria and principles of sustainable development. Energy efficiency is measured as ratio of GDP and energy use and its multiple factors of...

The paper argues that current long-term projections of global meat and feed demand may underestimate future consumption patterns for mainly two reasons. First, they do not explicitly consider increased demand for protein foods of animal origin with rising incomes in some developing countries,...