while some still insist the evidence just isn't convincing, others attending this week's
say it's so late in the game, so much damage has been done, they fear they can already see how this ends. the leaders at this conference are making it clear it's going to take a lot more than changing a few light bulbs or driving hybrid cars. today there was an urgency in their voices, it's where we begin tonight.
. good evening.
reporter: good evening, brian. this is about life or death. 192 countries are here in
to cut the
changing the climate and threatening the very existence of some nations and their people.
i'm a long way from home today.
this woman pleaded for f u.iji.
it is my hope that their lifetimes will never be affected.
her words accompanied by
people demanding action.
over and over
today, the u.s. conference delegates, countries must reduce their emissions. emissions for the planet.
the clock has ticked down to zero. the time has come to deliver.
reporter: the urgency over several e-mails, some scientists manipulated climate data. oil rich
said the e-mails have shaken trust in the science of
. the man who leads the panel says the science is broad and consistent.
the evidence has now been linked that the world will benefit greatly by
reporter: not by accident today, in washington, the epa ruled
health and welfare
starting next spring, large emitting facilities will be required to incorporate the best available methods for controlling
greenhouse gas emissions
when they plan to construct or expand operations.
reporter: the u.n.'s chief negotiator says the toughest issue is building trust among major economies. that all will truly reduce their carbon outputs.
i think it's critical for the
to see that china is stepping up to the mark. and it's critical for china to see that the
is stepping up.
reporter: the pressure is on, in less than two weeks,
and 109 other heads of states will come here for the finale of this conference raising the stakes even higher. brian?
starting us off in
now we move to health,