(n)
solar energy/solar power
(n)
wind energy/ wind power
(n)
nuclear power/nuclear energy
(n)
hydro power
(n)
biogas power/ biogas energy
(adj)
harmful
(adj)
plentiful
(v)
save energy
(n)
renewable energy
(n)
non-renewable energy
(n)
fossil fuel
(n)
recycle
(n)
resource
(n)
pollution
(n)
development
She wears a sweater to keep her body …………..in the early winter. (WARMTH)
warm
