By Jackson Dill andBrandon Miller, CNN

Updated 8:12 PM ET, Tue March 9, 2021This aerial picture shows people rowing a raft over a flooded road in Jakarta on February 20, 2021, following heavy overnight rains. The combination of so many people and the multitude of rivers has made this city especially prone to relative sea level rise.

(CNN)Coastal communities are experiencing sea level rise four times worse than global water rise, according to a new study released Monday.Groundwater pumping, extraction of materials from the ground and sediment production are all happening near the coasts and that is causing the land to actually sink — compounding the effects of a rising sea level.It is no coincidence that these are the same locations where people live, worsening the impacts and increasing the vulnerability.Many of the largest, most populated cities in the world are built along the deltas of major…