Under
the
proposal,
utilities
would
have
to
produce
at
least
11%
of
their
power
from
biomass,
geothermal,
solar,
wind
and
other
clean
energy
sources,
and
could
cover
the
remaining
4%
through
energy
efficiency
improvements.
Exempt
are
utilities
selling
less
than
4
million
megawatt
hours
a
year.
The
legislation
is
co-sponsored
by
Democratic
Senators
Jeff
Bingaman
and
Tom
Udall
of
New
Mexico,
his
cousin
Mark
Udall
of
Colorado
and
Byron
Dorgan
of
North
Dakota.
Republican
co-sponsors
are
Sam
Brownback
of
Kansas,
Susan
Collins
of
Maine
and
John
Ensign
of
Nevada.
The
measure
will
require
60
votes…
