What is hydrogen energy and why is it important?
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As governments and industry attempt to reduce greenhouse gas emissions to zero, hydrogen and its potential as a clean fuel are once again making headlines.
So what exactly is hydrogen energy and how could it be used as an alternative to fossil fuels?
Watch BBC Energy and Environment Analyst Roger Harrabin explain.
Learn more about the Climate Summit:
The COP26 world climate summit in Glasgow in November is seen as crucial if climate change is to be brought under control. Almost 200 countries are solicited for their emission reduction plans, and this could lead to major changes in our daily lives.
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