a large chunk was financed by germany's international development bank, the kfw. zeljko uljarevic manages the various water infrastructure projects for the kfw in montenegro. he's worried about the timeline. this sea outfall pipe has to be laid 1000 meters out in the ocean before the tourists arrive. this is a discharge pipeline for the treatment plant through which treated sewage is pumped into the ocean at a depth of 35 meters. divers are to fasten the pipes onto the ocean floor so they aren't washed away by the current. the clock is ticking. in a few days, the beaches here will be full of tourists. tourism is montenegro's biggest source of revenue. but more tourists also means higher power consumption. the electricity comes from montenegro's hinterland, one of europe's most water-rich regions. clean hydro power meets almost 70 percent of the country's power requirements. but demand is increasing. the country's largest hydropower plant is located at the piva reservoir. the dam walls are 200 meters high. for decades, it's been supplying a large amount of monteneg

. >> the kfw, germany's development bank, is funding the project -- not as a loan but as a gift.they're plowing 2.8 million euros into it. without that money, the project wouldn't be profitable for eletrosul. it would be too expensive, compared to other energy sources. >> it's about triggering projects and markets. the 2.8 million is a comparatively small sum when you consider the kind of market that could develop here, and the climate-friendly effect, from which german industry can ultimately also profit if it can sell its products competitively here. >> until just recently, these photovoltaic panels would have cost twice as much. the drop in prices in the sector makes solar power competitive even against hydro power. at least once a week eletrosul manager franklin fabricio lago flies out to his building sites. the power company is building several small plants. brazil gets about 80% of its electricity from hydro power. that makes the country the frontrunner in renewable energy. but in periods of drought, like the one ten years ago, that source of energy isn't reliable. >> we ne