Covering this all around the world. First Margaret Brennan with the president. Ive come here personally as the leader of the Worlds Largest economy and the second largest emitter, to say that the United States of america not only recognizes our role in creating this problem, we embrace our responsibility to do something about it. Reporter president obama came to office promising to slow Climate Change. Today he pressed china and india, the worlds other top polluters, to join him. And he offered to help poorer countries convert to clean energy. The goal is to get 147 countries to reduce Carbon Emissions enough to keep Global Warming below 3. 6 degrees fahrenheit. Thats the level some scientists believe would prevent natural disasters like floods and droughts. President obama said those types of events are a risk to Global Security and praised france for weeks after the terror attacks. What greater rejection of those who would tear down our world than marshaling our best efforts to save it. Reporter any agreement wont be legally binding, and it doesnt require congressional approval. But republicans have threatened to withhold funding for a deal. Scott, the white house argues that other countries wont cut back on lheir pollution unless america does so first. Margaret brennan in paris tonight. Margaret, thank k u. The worlds s ggest carbon polluter is china. And right now its capital is choking. Seth doane is there. Reporter thehick smog blanketed Tiananmen Square in a murky, hazardous haze. Levels of the most poisonous particulates were more than 20 times what the World Health Organization says s safe. On a polluted day like today beijing is limiting activity at sites. It is also encouraging people to stay indoors and encouraging more street cleaning. Ina launched a socalled war on pollution, which today it appears to be losing. 2 3 of chinas energy comes from coal. Heating systems make pollution even worse. Out with his family today, han wei told us the choking smog makes it tough just to leave the house. Your son is about 6 1 2. How much do you think about him when youre out in this pollution . I hope the government could do more so my kid could live in a better environment, he told us. But i know its not going to be done in a day. The government here said that the smog was made worse by high humidity and a lack of wind. Scott, we didnt see many people on the streets actually wearing these masks. Some told us they didnt believe they made a difference. Others said they simply felt pollution. Seth doane in the smog capital tonight. Seth, thank you. Its surprisinin but another growing threat to the environment is the earth itself. There is a spectacular amount of methane, one of the worst heattrapping gases, locked up in theheorlds frozen tundra. That is, untililow. We sent Mark Phillips above the Arctic Circle for tonights climate diaries. Reporter its a long way om paris to svalbardrdnorway, just 8 8 miles from the nortrt pole. Its not just winter up here. The arctic night has set in. Sarah strand, a 22yearold from california, wont see the sun again until mid february. And darkness isnt the only hazard. So i will take the sleigh down if you want to take the rifle. Okay. Reporter this isnt just a scientific frontier. By law sarah and her colleague norbert pirk cant go into the wilderness w whout packing protection. The bears may be more desperate in summer, when their sea ice Hunting Ground melts back more each year and where at least one bear has been driven to attack a Research Boat in s srch of lunch. H. But sarah and norbert are here in winter, braving the darkness and the cold and the bears, because their instruments are measuring a worryingngrend thats happening now. This is basically your baby up here, is that right . Yeah. That definitely has to be running if were going to get otherwise, all this suffering is for nothing. Reporter what the instruments are swing is that Greenhouse Gases that scientists used to believe were trapped forever in the frozen arctic ground are now being rereased. Its amazing were look at a gas exchange with the ground Carbon Dioxide and meths yain methane but then were comparing that to other parametersrsere temperature . Weather basically. Yeah. Reporter the worry is that with arctic temperatures rising more quickly than anywhere else the gases may be escaping at an increasing rate. And the more Greenhouse Gases, the more Global Warming. There are concerns of that, yes, especially with thehe permafrost thawing. Were trying to shine some light on this. Reporter in the dark. In the dark. Reporter one of the most remote spots on the planet has become the center r research into the future of it. And its not just because of what will happen to polar bears. The Scientists Say what happens up here is whats going to happen to all of us. And thats whats brought another amamican, hannah miller, up here too. The 21yearold from vermont didnt come for the skiing. She came to study the retreat of glaciers, whose melt water, according to nasa, has contributed to a rise in global sea levels of around three inches in the past 20 years. What the Climate Change debate science. The frustration comes in when Climate Change deniers use a of the uncertainties to say that your argument is false because you can have uncertainties and still have solid argument. Reporter a solid argument being sought in the frozen solid landscape. Cuttingeded science on the Northern Edge of the world. Almost sixty million americans are affected by mental illness. Together we can help them with three simple words. My name is chris noth and i will listen. From maine to maui, thousands of High School Students across the country are getting in on the action by volunteering in their communities. Chris young action teams of High School Students are joining volunteers of america and d jor League Baseball players to help train and inspire the next generation of volunteers. Carlos pea its easy to start an action team at your school if you were a hippie in the 60s, you need to know. Its the dawning of the age of aquarius. Yeah, and Something Else thats cool. What . Osteoporosis is preventable. All osteos preventable . Right on if you dig your bones, protfct them. All cbs cares well, it looks a little like the Arctic Circle in the midwest, which is now blanketed in storm warnings. Heres david begnaud. Repepter over the last 2 2 hours this has been the scene across much of kansas and parts of oklahoma. Every time it crackles it means Something Else is coming down. Oh, its coming down. Reporter an in of ice covererepower lines that knocked out electricity to thousands of homes and businesses. State of emergency in all 77 counties. You know, all night we could hear the limbs cracking and the ice falling and we just didnt know what to expect. Reporter at least four people died after major flooding in texas. Authorities received nearly 37 calls for water rescues since thanksgiving. You are freaking luluy. I know. No way you should have survived that. Reporter in utah a 32yearold woman fell into this icy reservoir while trying to save her dog, who fell through the ice. Mantua Police Officer brad nelson led the rescue. Walking out onto the ice you could hear it cracking beneath my feet. Theres not a whole lot she could have done to help herself at that point. Reporter here in minneapolis 8 to 12 inches of snow is expected over the next 12 to 24 hours. Scott, across the midwest tonight some 8 million p pple are under a Winter Weather advisory. David begnaud reporting tonight. David, thank you. Today the suspect in that shooting at a planned parenthood his first court appearance. He will face firstdegree murder charges and perhaps the death penalty. Three people were killed, including a Police Officer. Nine were wounded. Barry petersen is in Colorado Springs. The initial charge against you is murder in the first degree. Reporter Robert Lewis Dear appeared by video link from the county jail, standing next to a public defender. He was asked if he had any questions. He answered in a monotone. No questions. Reporter sources say he went to the clinic on friday with a duffel bag full of weapons a brought propane tanks in his car he could shootnd cause an explosion. When he surrendered, he reportedly said, no more baby parts. That may have been a reference to videos filmed and edited by antiabortion activis where they sayaylanned parenthood officials talked of selling body an official from the group that includes theheolorado springs clinic was among those in the videos. So anywhere from three up to seven. Reporter dear lived in hartsel, about 65 miles west of Colorado Springsn a mobile home. He was described as reclusive, a man who ever interacted with others and would rarely make eye contact. For the people of Colorado Springs this is a time of mourning for the dead. University of colorado Police Officer garrett swasey, mother of two jennifefemarkovsky, iraq war veteran kearre stewart, who was there with his girlfriend. Angelica llanca and her daughter alexis were in the clinic but separated when the shooting started. Angelica hid in a bathroom. Were you afraid you would be killed . I dont know. To tell you the truth, all i wanted was my daughter. Reporter aleles was among those evacuated hours into the siege. She is still traumatized. I can still hear the gunshots. Now youan hear them in your mind . R rorter it is likely y at more charges will be filed in the next several weeks. As for the death penalty, sct, the local d. A. Says that decision is sevel months away. Barry, thank k u. Late today chicago Police OfficerJason Van Dyke was released on 1. 5 millili bail. Van dyke is charged with murdering 17yearold Laquan Mcdonald, who was armed with a small knife. Video released last week showed e officer shooting monald 16 times as mcdonald was walking away. A baltimore Police Officer went on trial today in the death of freddie gray, who suffered a spinal injury in april while being driven in a police vanan William Porter is charged with manslaughter. Five other officers will be tried later. The city has been gearing up for this case, and heres jeff pegues. The city and the Police Department need to do better. Baltimores new police commissioner, says his department has been training for the trials and the unrest they could bring. We wont stop reporter are you ready for what may come during and after the trials . We are. Reporter davis acknowledges that wasnt the case in april. After freddie grays death the city erupted. Businesses were looted and torched. Police officers were injured. In the aftermath murders and Violent Crime spiked and officersere accused of not being aggressive eugh. There wereoncerns that they were pulling back. Did that happen . I think a more thoughtful way to recognize what happened for a couple months here is this Police Department had ptsd. You said ptsd. Is that a polilically correct way of sayininthat they were taking a knee . I think its a correct way of saying that cops had anxiety. Reporter daviss predecessor 311 homicides this year, a 59 increase or 2014. Davis, who was Deputy Commissioner at the time of the rioting, says one reason the murder rate is up is this the looting of 30 pharmacies. Suddenly 288,000 doses of prescriptionrugs were on the streets with gangs f fhting for control. When they get their hands on their stashes, then theres a competition for the geography that they need to occupy to sell their drugu. And then from that vlence has erupted. Reporter with the trials of those six Police Officers scheduled to extend straight into next year, davis says that he will treat a protest like a protest and a riot like a riot. Scott, that is something he says the department did not do seven months ago. Jeff pegues in baltimore. Jeff, thanks. In the president iaiacampaign Hillary Clinton made news today whether u. S. Combat troops should join the fight against isis in syria and iraq. I agree with the president s point that were not putting american combat troops back into syria or iraq. We are not going to do that. This fight under no circumstances would you not do that . Well, at this point i cannot conceive of any circumstances where i would agree to do that because i think the best way to defeat isis is, as ive said, from the air, which we lead, on the ground which we enable, empower, train, equip, and in cyber space where dont forget they are a formidable adversary online. So what i want to say is look, we dont know yet how many special forces might be needed, how many trainers and surveillance and enablers might be neeeed but in terms of thousands of combat troops like some on the republican side are recommending, i think that should be a nonstarter. It was a wideranging discussion. Dont miss it tomorrow on cbs this morning. Online or in stores . [cough, cough] mike . Janet . Cough if you can hear me. Dont even think about it. I took mucinex dm for my phlegmy cough. Yeah. But what about mike . He has that dry scratchy thing going on. Guess what it works on his ugh too. Cough guess what . It works on his cough too. What . Stop dont pull me spoiler alert she doesnt make it only mucinex dm relieves bothwet and dry coughs for 12 hours with two medicines in one pill. Start the relief. Ditch the misery. Ever since darryls wife started using gain flings, their laundry smells more amazing than ever. sniff honey, isnt that the dogs towel . dog noise hey, mi towel, su towel. More scent plus oxi boost and febreze. Its our best gain ever jill and kate use the same dishwasher. Same detergent. But only jill ends up with wet, spotty glasses. Kate adds finish jetdry with five power actions that dry dishes and prevent spots and film, today, cyber monday, is expected to be the Biggest Online shopping day ever. More than 121 million americans plan to shop from home and work. Our cbs News Business analyst Jill Schlesinger is with us. Jill, how big a day was it . Its going to be pretty big. Were looking at probably 3 billion in sales, according to adobe digital. Now, if we get there, it would be the Largest Online day of shopping ever. We have some early results from midnight to 10 00 a. M. It was pretty amazing. 50 million visits to 4,500 websites in the u. S. Those Online Shoppers spent about half a billion dollars. Thats up about 14 from a year ago in that same time horizon. These numbers are going to get bigger. Where more people are going to shop online than actually go into a store . I think eventually. But today absolutely not. If you look at the recent data from the commerce department, we know that online sales account for somewhere in the vicinity of 15 , 16 of total sales. Maybe well drift up to closer to 20 . But you know, for now people still want to be in a physical location and spend their dollars there. I understand some of the retailers couldnt handle the traffic today. Yeah. This was pretty wild because over the last few days outages at very big retailers like nordstrom or victorias secret, this morning a big outage at target. Paypal down for a while. So technology not always perfect. I think the good news here is with the advent of apps and information were smarter, were better consumers. And the reality is we can now combat those algorithms that are targeting us so beautifully by being informed. Business analyst Jill Schlesinger, thank you very much, jill. An olympic champion has her story, just ahead. Royal watchers are enjoying a new look at britains youngest princess. Charlotte, the daughter of william and kate, the duke and duchess of cambridge, is nearly seven months old. Mom took the pictures. Today olympic champion Amy Van Dyken rouen celebrated a big breakthrough. She walked. The sixtime gold medal swimmer strides without upper body braces a huge step. Van dyken rouens spine was severed nearly two years ago in an offroad vehicle crash. And well be right back. Woman what does it feel like when a woman is having a heart attack . Chest pain, like theres a ton of weight on your chest. Severe shortness of breath. Unexplained nausea. Cold sweats. Theres an unusual tiredness and fatigue. Theres unfamiliar dizziness or lightheadedness. Unusual pain in your back, neck, jaw, one or both arms, even your upper stomach, are signs youre having a heart attack. Dont make excuses. Make the call to 911 immediately. Learn more at womenshealth. Gov heartattack. While i was on a combat patrol in baqubah, iraq, a rocketpropelled grenade took my arm off at the shoulder. The Wounded Warrior project since 2007. Warriors, you dont have to be severely wounded to be with the Wounded Warrior project. We do have a lot of guys that have posttraumatic stres