"Many lines of evidence demonstrate that human activities, especially emissions of greenhouse gases, are primarily responsible for recent observed climate change".
The global average temperature increased by more than 1.2 degrees Fahrenheit (0.7 degrees Celsius) in the last 30 years.
It notes that worldwide it is "extremely likely" that more than half of the global temperature increase since 1951 can be linked to humans.
Among the more significant of the study's findings is that it is possible to attribute some extreme weather to climate change.
250 hectares de garrigue et pinède brûlés, un camping évacué — Hérault
Une centaine de pompiers, une trentaine de véhicules et quatre Canadair sont engagés. Une dizaine d'hectares a été brûlée et un véhicule détruit, précisent les pompiers.
A government scientist told the Times on terms of anonymity they are fearful that Trump and the White House could change or suppress the report before its August 18 approval deadline.
The Times also reports that scientists are expressing concerns that the Trump administration has yet to indicate how or whether it will act on the findings.
It mentions the 2011 heat wave in Texas but says that event was more complicated than the 2003 European heat wave and record heat in Australia in 2013, which pointed to man-made contributions.
Calling climate change a hoax created by China, Trump had recently said that, "the concept of global warming was created by and for the Chinese in order to make U.S. manufacturing non-competitive". In his first six months Trump picked a climate change denier to lead the Environmental Protection Agency, rolled back around two dozen environmental regulations, and announced that the USA will withdraw from the Paris climate agreement.
Average rainfall every year across the US has increased by 4 percent since the start of the 20th century, the Times reported. Scott Pruitt, who is in charge of the environmental protection agency, has said, "I think that measuring with precision human activity on the climate is something very challenging to do and there's tremendous disagreement about the degree of impact".
The Climate Science Special Report was authored by scientists from 13 federal agencies - including the National Oceanic and Atmospheric Administration, NASA and the White House's Office of Science and Technology Policy - and several academic institutions.
A draft government report on climate says the U.S.is already experiencing the consequences of global warming. An increase above 2 degrees Celsius would push the global environment closer to catastrophic changes, scientists have said. Scientists who worked on the report, the Times reported, anxious that it might be suppressed.
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