In the US, it's cheaper to build and operate wind farms than buy fossil fuels
Something I miss from reading those articles: what are you doing when the wind doesn't blow for a few days or even weeks? And in case of solar farms, the sun doesn't shine (like at night)? How do you store the energy efficiently?<p>If you think batteries, how long does the battery of your smartphone or laptop works? 5 years max? Maybe 10? Is this the timespan you plan your reliable infrastructure for? And how "green" is it to build these batteries?<p>If you think pumped-storage hydroelectricity, how much places do you have where you can have two pools (one uphill, one downhill) to store the water? How much energy can store in there?<p>The thing is, you'll build all these solar and wind farms and then still build and run the fossil plants, because you aren't able to store the energy to make it reliable enough.