Most existing large reservoirs, however, are in desert areas or in environments formerly covered only sparsely by brush, grass-woodland or scrub timber, with the result that evaporation greatly exceeds the former evapotranspiration.
(Most existing large reservoirs; are; in desert areas or in environments) (environments; covered only sparsely; by brush, grass-woodland or scrub timber; T:formerly) (evaporation; exceeds; the former evapotranspiration)
Most existing large reservoirs environments evaporation
are covered only sparsely exceeds
in desert areas or in environments
by brush, grass-woodland or scrub timber T:formerly
the former evapotranspiration