energy problems; energy issues
kernel; core; nucleus; center; centre
stone (of a fruit); pit; core (of an organization, team, etc.); nucleus; nuclear weapons; nucleus (of an atom); nucleus (of a cell)
disposal; throwing away; dealing with (a problem); measure; punishment; penalty
to come to a dead end; to come to a standstill; to reach a deadlock; to reach an impasse; to reach a stalemate
exactly the same; exactly as is; without any change
foundation stone; cornerstone
achievement; meritorious deed; distinguished service; contribution
switching over to; migration; transition
drying up; running dry; running out; being exhausted; being drained
to afflict; to torment; to harass; to molest
model; dummy; model (profession); fashion model; model (of a vehicle, machine, etc.); version; model (e.g. mathematical)
period of transition (e.g. from old to new system)
to keep; to preserve; to hold; to last; to endure; to keep well (food)
this world; this life; current epoch (i.e. the Holocene epoch)
prosperity; thriving; flourishing
exhaustion; fatigue; impoverishment; (financial) exhaustion; ruin
this time; now; next time; another time; recently; lately
restoration; rehabilitation; recovery; recovery (from an illness); recuperation; convalescence
structure; construction; arrangement; plan; plot; contrivance
loop; band; loop (programming); loop (railway line); time loop; temporal loop
eternity; perpetuity; permanence; immortality
outline; summary; gist; in brief
details; particulars; detailed; specific; close-up view (of a digitally displayed map); zoomed-in view
to chase; to run after; to follow (a set order, a trend, etc.); to drive out; to get rid of; to drive (e.g. a herd)
federation; federal state; United States of America
that way; that direction; there; that (one); you; your family
confirmation; verification; validation; review; check; affirmation
question and answer session
to move (house); to transfer (department); to change the target of interest or concern; to elapse (passage of time); to be permeated by a colour or scent; to be infected
white heat; incandescence; becoming excited; getting heated (e.g. of a discussion); reaching a climax
ground-breaking; revolutionary; unprecedented; epoch-making
to one's regret; regrettably; unfortunately; what can be done about ...; ... cannot be helped
to be heard; to be audible; to be said to be; to be reputed
fault; weakness; flaw; crux (of a matter); difficult point; point of contention
to lash out at; to flare up at; to fly at; to turn on
system; organization; organisation; architecture
as (X, then Y); with; in accordance with; in proportion to