The encyclical letter Laudato Si is available here on the Vatican website. Moving the discussion within nations and down to the local level will concern us from this section through number 181.
176. There are not just winners and losers among countries, but within poorer countries themselves. Hence different responsibilities need to be identified. Questions related to the environment and economic development can no longer be approached only from the standpoint of differences between countries; they also call for greater attention to policies on the national and local levels.
Concerns about environmental degradation and poverty can be addressed nationally and within communities. Often, much good work is done even when national governments, multinationals, and world conferences fail to act or follow through on promises.