The article talks about how renewable energy is growing globally, but most of our energy still comes from non-renewable sources. They looked at why renewable energy is increasing, especially in the power sector where new rules help it grow faster. Other areas like heating and transport are slower because they don't have as many helpful rules. They found that policies that support renewable energy help it compete better with non-renewable kinds. So, for renewable energy to do even better, more support is needed in other areas like heating and transport too.