 Welcome back to NewsHour. There's another nail in the coffin of global warming denial today. The European Union's climate change monitor, Copernicus, reports global temperatures 1.5 degrees Celsius higher than the pre-industrial era for every one of the last 12 months. Andrew Dessler is professor of atmospheric sciences at Texas A&M University in the US. I asked him if these new figures meant world leaders had already broken the agreement they made in Paris in 2015.