Hydroelectricity is one of the largest sources of energy accounting for roughly 20% of the worldwide demand of electricity with around 800 GW of capacity installed.There is considerable potential still left and developing countries like India and China can be expected to install another 500 GW over the coming years.Hydroelectricity is very important as it does not lead to GHG emissions and contribute to global warming.It also does not have the drawbacks like other renewable energy forms of high costs and intermittency.The advantages of hydroelectricity are substantial enough to far outweigh any disadvantages.But like nuclear energy,hydro power has some tail risks which can lead to catastrophic damage.The costs of hydroelectricity are not a simple function of dollar costs.It should also take into account the massive displacement costs in case of massive hydro dams,the loss of ecology and potential tails risks which can lead to massive payments.

India’s Green Companies are seeing tremendous growth backed by the nation’s massive energy demand increase.The 8% Plus Economic Growth coupled with the already massive electricity deficit which makes brownouts of 8 hours a day normal in many places in the country provides the macro background underpinning the growth.India’s Green Industry is still in a nascent state compared to the massive solar and wind industries in countries like China and Germany.However attracted by the massive potential a number of companies small and large have entered the fray.Most of India’s large energy groups,utilities have already established a small presence or are in process of doing so.While Wind Energy is the largest Renewable Energy Industry in India after HydroElectricity,Geothermal Energy is non-existent without a single large commercial plant.Biomass Energy is quite well developed and Solar Energy is the fastest growing Green Industry.Here is a comprehensive list of the Green Companies in India operating in the different Alternative Energy Sectors.

Hydroelectricity power plants are the biggest power stations in the world dwarfing the biggest nuclear and coal power projects.The world’s biggest power plant is the Three Gorge Dam in China which at 22.5 GW is more than 50% larger than the 2nd biggest power station in the world.Most of the world’s largest hydroelectricity plants in the world are situation in China and South America.North America also has some of the larger hydro power plants.China is the by far the world leader in hydro power plant capacity with around 200 GW which it aims to double to around 400 GW by 2020.Other major hydroelectricity countries are Canada,USA,Brazil and India.Note Hydroelectricity is responsible for producing around 20% of the world’s electricity.Here are some of the major world hydroelectricity power plants .

Hydroelectric Dams have disadvantages which are quite different from those of other forms of renewable energy like solar, wind, geothermal or nuclear energy. Hydro Power in small sizes which is constructed keeping nature in mind has almost no drawbacks, however the big Hydro Power Dams have some sizable problems. Some of these are tail risks […]

Hydroelectricity is the production of electrical power through the use of the gravitational force of falling or flowing water.Hydroelectricity capacity is around 800 GW accounting for almost 20% of the global electricity capcity.China and Canada have the largest hydro capacities in the world.If you consider Hydropower as renewable energy,then Hydro is the most widely used renewable energy in the world.In fact Hydroelectricity is the 3rd biggest source of electricity in the world after coal and oil/gas.Hydroelectricity power plants can have massive capacities with the Three Gorges Dam in China being the world’s largest at 22.5 GW.The Itiapu and Guri Dams in South America are the 2nd and 3rd largest with 14 GW and 10 GW capacities.China is set to double its massive hydroelectric capacity to almost 400 GW by 2020 from 20 GW currently.The advantages of Hydroelectricity are many

Alternative Energy in India saw significant growth in 2010 with the last 9 months of the year seeing capacity additions of 1800 MW which is almost 10% of the total installed capacity of 18500 MW.The growth in renewable energy was led by Wind Energy which forms almost 70% of the total renewable energy capacity in the country at around 13500 MW.The strong incentives given by both state and central government has led to the sharp growth of wind energy.Note Wind Energy is quite close to Gas based electricity price.India Needs at least 68 GW of Renewable Energy Capacity by 2020 to meet its RPS target of 15% set by CERC (note this is capacity only not hours of electricity).