says no reasonable person could say that climate change is the country's top threat. florida senator says we can't predict the climate. 25 or 30 years from now. >> there has never been a time when the climate hasn't been changing. what percentage is due to man's activity is not a consensus on. >> what do you think? my job is to go through the different solutions they present to us. i can tell you all the changes they are presenting to us would do nothing, even according to scientists, would do nothing to change our climate, especially in the united states. it would have a dramatic impact on our economies. >> environmental challenges are all too real for china's capital. beijing is struggling with extremely dirty air for the fifth day in a row. schools are keeping students indoors.
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