Greenwashing - How Green is Brazil's Hydroelectric Power? The Brazilian government says huge hydroelectric projects underway in Amazonia will provide environmentally friendly electricity across the country. The operators say the projects will boost development in the areas where the power is to be generated. But how clean will this energy really be? What are the costs? Critics say huge amounts of methane are released by rotting vegetation submerged in lakes behind dams, especially in tropical areas. We go to Porto Velho to investigate. CO2 Certificates: Emissions trading or trading with emissions certificates is an instrument of environmental policy that aims to reduce environmentally damaging emissions at the lowest cost to the economy. In 2005, the European Union Emissions Trading System was put into law. Climate Protection through Emissions Trading. Ever since the economic crisis hit the pace at which German implements its climate protection aims has slowed dramatically. The inducements offered by CO2 certificates are no longer high enough for industry. And that's despite the existance of ideas which can drive climate protection on sustainably. Modern gas fired power stations are needed to provide a bridging technology as German aims to alter energy policy. But will investments provide the returns? Green Economy - Air Conditioning in India : They keep rooms cool but heat up the atmosphere: Most of air conditioning units around the world use coolants with a high green house potential. Now an Indian manufacturer is trying to introduce climate friendly units onto the competitive Indian market and in doing so setting an example for other countries. Since March 2012 the Indian firm Godrei has been using propane gas instead of hydrofluorocarbons. Propane does not damage the ozone layer. And in a market where 4 million air conditioning units are sold every year that could be important. The international climate protection initiative supports the project to the tune of 2 million euros. Germany's GIZ agency is also involved.