Around the world, governments are tapping into renewable sources to fuel the growing demand for energy. But as the conversation steers away from the costs of clean energy to the best practices, CNBC's Nessa Anwar evaluates which countries are having the most success and the challenges that still lie ahead. ----- Subscribe to us on YouTube: Subscribe to CNBC International TV on YouTube: Like our Facebook page: Follow us on Instagram: Follow us on Twitter: #CNBC #RenewableEnergy #ClimateChange
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