Ensure access to affordable, reliable, sustainable and modern energy for all. In regards to Affordable and Clean energy, it matters because around the world 1.3 million people live without access to electricity. These numbers are focused in Africa where 620 million people can not get affordable,

This goal has to do with all things infrastructure. It is crucial to achieving sustainable development and empowering communities in many countries. It also most directly wants to "Build resilient infrastructure, promote sustainable industrialization and foster innovation" (UN Sustainable Developme

This goal strives to "Take urgent action to combat climate change and its impacts". With climate change affecting every country on Earth we need people stepping up to start reducing their impact. By providing solar panels instead of lamps etc. it is one way we can reduce emissions at their root. See