The development of variable renewable energy (VRE) and their massive installation are some of the challenges that the economies of a large part of the world will have to face in the coming years to help ensure a reasonable sustainability of the planet. On the other hand, the advances that have...

The main aim of this paper is to observe the environmental behaviour in some cities of the word, by analyzing for each city the trends of several energy and emissions indicators that appear as explanatory variables in both energy and labour average productivity equations. At the same time we...

What will come first - non-acceptable global warming or extinction of oil reserves? Both processes can bring substantial costs to the mankind, but their order has important economic implications. The answer to this question will either lower oil price in the long run or will lead to its further...