When it is combined with energy storage and smart software solutions, solar energy becomes a reliable and ever cheaper source of energy. (corporate.vattenfall.com)
As competitors come on board with cheaper sources of energy, JCH will see his customer base erode if he doesn't respond to the resulting price pressures. (judithcurry.com)
Nevertheless, the benefits of coal as a widely available and relatively cheap source of energy underscores its important role in energy security, economic development and the alleviation of energy poverty worldwide. (iea.org)