Emissions from tropical hydropower are often underestimated and can exceed those of fossil fuel for decades.

The installed capacity of the UK's wave and tidal sector has grown 40-fold in the past ten years. Ministers expect similarly impressive growth by 2020. But to achieve this, the country needs arrays.

Wind is still considered an area of growth by the government of India; however the situation on the ground is a different story.

Accelerated Depreciation, an important driver of growth for Indian wind energy sector, was modified in April this year, forcing strong reactions from the industry. Along with this, the ambiguity on generation based scheme (GBI) has created confusion among independent power producers (IPPs). There is fear that the rapid advance in wind sector made till last year may suffer a big setback at least in the short run due to these two moves. However, the long term perspective is still healthy.