Over 50 nations are set to attend a world-first conference on phasing out fossil fuels in Colombia next week, amid concerns over energy security and climate change. The conference was born out of frustration with the United Nations climate talks, where efforts to negotiate a fossil fuel exit strategy have stalled. Major fossil fuel producing nations Australia, Canada, Norway, Angola, Mexico, and Brazil are expected, along with developing emerging markets Turkey and Vietnam. However, major coal, oil and gas producers such as the United States, China, Saudi Arabia and Russia are not expected to attend. The event will be closely watched for political signals from an emerging coalition of fossil fuel producers and consumers pushing for a phaseout outside the UN process.