Why 100% renewable energy goals are not practical policies - Renewable Energy World

Why 100% renewable energy goals are not practical policies - Renewable Energy World: Renewable Energy Portfolio Standards require the utilities to generate or procure a minimal percentage of energy in their portfolios from renewables energy as defined by the eligible technologies in each statute, namely solar, wind, hydro, geothermal, biomass, and storage. The first stage of the policy occurred in the early 2000s as states began to enact the policies into law with goals of around 20%. But today, we are currently in a new era where state legislatures and Green New Deal advocates are debating whether or not to increase the nominal requirements - the percentages of the energy portfolios to come from renewables -  to either 50% or 100% within the next 15 or so years. In terms of the actual energy that has to be produced to meet the standards, the targets are significantly increasing.