Saturated and detailed monitoring of the whole planet will be necessary to prevent deaths from natural disaster, pandemics, etc. We're already seeing it improve after disasters such as the Nepal earthquake where drones were used to quickly map areas of devastation allowing the emergency services to plan and prioritise areas for rescue and rebuilding.
Hopefully in future our planet will be so extensively monitored we'll even be able to be give accurate warnings about earthquakes, volcanic eruptions and tsunami, as well as helping to forecast long term weather which may allow us to better use farmland and food production, for example planting the appropriate crops for the expected weather in the area.
Resource Watch - https://resourcewatch.org/
A dynamic platform that leverages technology, data, and human networks to bring unprecedented transparency about the planet right now.
Robots ahoy! Mapping Earth's surfaceBBC - 13-Sep-2018
SEA-KIT may be the autonomous vessel to win the XPRIZE for best seabed mapping system
Running out of water as dams shrinkGuardian - 11-Apr-2018
Early warning satellite system reveals countries with shrinking reservoirs.
Swarm of Shoebox Satellites Will Predict Natural DisastersThe Daily Beast - 06-Nov-2017
Fleet of tiny satellites constantly monitoring our planet.