In just one day, the sun delivers about as much energy as has been consumed by all human beings over the past 35 years. So why haven’t we exploited more than a tiny fraction of this potential? There are many reasons: cost, storage, transmission, distribution, entrenched subsidies and technological challenges are but a few of them.
But the reasons not to take advantage of renewable energy are falling away. A report  published this week by the Intergovernmental Panel on Climate Change  (IPCC) found that close to 80% of the world’s energy demand could be met by tapping renewable sources by 2050, if backed by the right enabling public policies. I served as a Coordinating Lead Author for the Policy and Deployment chapter of the report, as well as member of the Summary for Policy Maker’s team, and I can attest to how much rigorous analysis and effort comparing data and sources went into this process and document.
The same Special Report on Renewable Energy Sources and Climate Change Mitigation found that the technical potential of renewable energy technologies “exceeds the current global energy demand by a considerable amount—globally and in respect of most regions of the world.”
These encouraging findings were released Monday, May 9, after being studied carefully, examined, and then approved by member countries of the IPCC in Abu Dhabi, United Arab Emirates.
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