Because they are not universally present in all areas, and are not present at all times.
Answer: In 2006, about 18% of global final energy consumption came from renewables, with 13% coming from traditional biomass, such as wood-burning. Hydroelectricity was the next largest renewable source, providing 3% of global energy consumption and 15% of global electricity generation.
Trace the development of technology in the country and relate it to the international and worldwide developments?
The worldwide system of measurement is called SI (short for Système international d'unités). It is a variation of the metric system.
The metric system!
The metric system
Because they are not universally present in all areas, and are not present at all times.
I think they are VERY suitable; but so far, government policies don't exactly favor renewable and clean energy options. That is, billions are given in subsidies to petrol companies, money which would really be better invested in clean energy options.
The energy sources from highest to lowest percentage are as follows: Coal Nuclear Hydroelectric
North America gets its natural resources worldwide.
Interflora
Biomass
The demand for natural resources.
Reserves of silver worldwide in demonstrated resources from producing and nonproducing deposits stood at 280,000 metric tons in 2002.
Mavel is a Czech - American company that is one of the premier international engineering and manufacturing companies that provides hydro turbines for small hydroelectric power plants worldwide.
The global village promotes the rational allocation of resources, capital, technologies, products, market and labor worldwide and the development of the national economy, providing a vast space for the development of national economies.
demand for natural resources (study island)
Many companies offer expatriate health insurance worldwide. One such company is Allianz Worldwide Care, providing global health and medical insurance.