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==Ongoing challenges== | ==Ongoing challenges== | ||
===The renewables approach {{light|(+ energy storage)}}=== | ===The renewables approach {{light|(+ energy storage)}}=== | ||
* [[Solar]] & [[wind power]] would have to be the main sources | * [[Solar]] & [[wind power]] would have to be the main sources (in most parts of the world). | ||
** Most people don't live near regions suitable for [[hydropower]] or [[geothermal power]]. {{talk|TODO: link to discussions about what regions they ''are'' suitable}} | |||
** [[Biofuels]] cause global [[hunger]] and [[deforestation]], unless only [[biomass waste]] is used (which is in [[How much biomass waste is there?|very limited supply]]). | |||
* Most solar panels today would probably be '''unsustainable''' or even impossible to scale up, due to having [[solar panel minerals|too many scarce minerals in them]]. | * Most solar panels today would probably be '''unsustainable''' or even impossible to scale up, due to having [[solar panel minerals|too many scarce minerals in them]]. | ||
** ''See discussion on'' [[solar panels made of abundant materials|alternatives to this]]. | ** ''See discussion on'' [[solar panels made of abundant materials|alternatives to this]]. | ||
* Batteries [[How much short-term energy storage for solar?|''might'' be scalable enough]] to smooth out the '''day/night''' cycle of solar. {{x|Best bet would be either [[sodium-ion]] or [[iron redox flow batteries]].}} | * Batteries [[How much short-term energy storage for solar?|''might'' be scalable enough]] to smooth out the '''day/night''' cycle of solar. {{x|Best bet would be either [[sodium-ion]] or [[iron redox flow batteries]].}} | ||
** But the '''seasonal''' fluctuations of wind & solar [[How much seasonal energy storage?|probably need ''far more'' energy storage capacity]]. | ** But the '''seasonal''' fluctuations of wind & solar [[How much seasonal energy storage?|probably need ''far more'' energy storage capacity]]. | ||
*** ''See discussion on'' [[What could provide enough seasonal energy storage?|other energy storage types and whether any could provide enough capacity]]. | *** ''See discussion on'' [[What could provide enough seasonal energy storage?|other energy storage types and whether any could provide enough capacity]]. | ||
More discussions: | More discussions: | ||
* [[Is there enough land to scale up wind power?]] (without causing significant ecological damage)? | * [[Is there enough land to scale up wind power?]] (without causing significant ecological damage)? | ||