El Tajo. Historia de un río ignorado

Resume las investigaciones realizadas en esta zona de Ovalle, respecto de bellos petroglifos, realizados por culturas precolombinas. Con muchas fotografías a todo color.

This book is about an ancient mastery: the one of the crystalline reality of the quartz inscribed in your heart, where it is, beyond time, your link with the message of the quantum quartz and the evolutionary meaning of their masteries. Each of the Atlantean master quartz, that are part of the so-called quantum masteries in this book, can become for you a personal master quartz of self-knowledge and personal growth. This book is, in itself, a complete course of learning, experience and practical guidance to experience their teachings; you will learn to recognize each of the Atlantean master...

In recent years, due to expanding populations and industries, regulatory authorities have imposed tighter discharge limits on nutrients from wastewater treatment facilities to avoid eutrophication in water streams. Common methods, such as metal salt precipitation, are being used to lower phosphorus concentrations which are a main contribution. However, alternate phosphorus removal techniques, such as phosphorus crystallisation, can provide further benefits. Precipitated solid can be utilised as a marketable fertiliser. Principles of magnesium and ammonia phosphate precipitation, working with...

El futuro del delta del Ebro, una de las zonas húmedas más importantes de Europa, se encuentra en una importante encrucijada. Después de varias décadas de gestión irracional del agua y del territorio, tanto en la cuenca como en el propio delta, la degradación ecológica amenaza con llegar a un punto de difícil retorno. La intensa intervención humana en el propio delta y en la cuenca fluvial está provocando una alteración considerable tanto del medio físico como del biológico, debido básicamente a la modificación de los flujos de agua, nutrientes y sedimentos, así como a la...