New Report Reignites Climate Change Debate Within US Gov't

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"This report provides the most comprehensive look at the effects of climate change on the United States ever, and the results, as we've sadly grown accustomed to, are quite terrifying - increased wildfires, more damaging storms, dramatic sea level rise, more harmful algal blooms, disease spread, dire economic impacts, the list goes on and on", she said.

Climate change is already hurting the global economy and will cost the U.S. hundreds of billions of dollars annually by century's end unless drastic action is taken to cut carbon emissions, a major USA government report warned on Friday.

It says warming-charged extremes 'have already become more frequent, intense, widespread or of long duration.' The report also notes the last few years have smashed USA records for damaging weather, costing almost $400 billion since 2015.

It's unlikely the timing of the report's release had much to do with the Katowice gathering.

It also details how global warming from the burning of coal, oil and gas is hurting each region of the USA and different sectors of the economy, and projects increased deaths and disease. The federal report reinforces these findings, although its focus is primarily on the US.

Mr. President, the majority of Americans are deeply concerned about the climate crisis and demand action. "As a climate scientist it is nearly surreal".

While scientists talk of average global temperatures, people feel extremes more, he said.

Gore's lifestyle aside, his statement comes amid what appears to be a continuing denial from Trump and members of his administration about the dangers climate change poses to the environment and to the world's economy. "That affects our jet stream pattern and counterintuitively might lead to more extremes on both sides - whether it be drought and flood, or cold and warm - because we get these higher amplitude wave patterns in the jet stream".

The National Academy of Sciences reviewed the report, and one of the members said this: "We have wasted 15 years of response time".

Outside scientists and officials from 13 federal agencies wrote the report, which was released on the afternoon following Thanksgiving.

Earlier in the week, Trump tweeted about the brutal cold spell that hit the East Coast over the Thanksgiving holiday and questioned "Whatever happened to Global Warming?" He has also rolled back Obama-era environmental and climate protections to boost production of domestic fossil fuels.

"And this warming trend can only be explained by human activities, especially emissions of greenhouse gases into the atmosphere". Since Trump dismissed the notion of global warming, the fate of multi-million-dollar government contracts and programmes has been up in the air, while the debate of whether or not man-made climate change is real continues.

It's a "transparent attempt to continue the campaign of denying and suppressing the best of climate science", co-author says.

"I often say weather is your mood, and climate is your personality", Shepherd tells Here & Now's Robin Young.