In the context of energy crisis and global climate deterioration, sustainable development clean will become a new direction for future development. Based on process in China past ten years, this paper expounds China’s policy plan. The hydropower, wind power, solar power recent years is analyzed. On basis, Grey Forecasting Model used to forecast structure next 10 point out market opportunities f...

in this paper, we introduce the new notion of strongly j-clean rings associatedwith polynomial identity g(x) = 0, as a generalization of strongly j-clean rings. we denotestrongly j-clean rings associated with polynomial identity g(x) = 0 by strongly g(x)-j-cleanrings. next, we investigate some properties of strongly g(x)-j-clean.

This article calls for engaging the public and private sectors of developing and industrialized countries in a global clean cooking fuel initiative (GCCFI) to bring about a worldwide shift to clean fluid fuels for cooking and heating in 10-15 years’ time -with an emphasis on providing clean fuel to the poorest households. This initiative is crucial to implementation of the Millennium Developmen...