Save us from tree-less asphalt deserts | Letters

Phil Allen on Northern Ireland’s priceless natural assets, Paul Townsend on Pope Francis’s plea for the environment, and Philip Bisatt on the absence of trees from British town planningRe your editorial on the Great Barrier Reef and “the values that money can’t measure” (29 June), Dieter Helm’s “natural capital” approach recognises that some assets are literally priceless and must be maintained.As an example, the drainage path of the river Bann is