Sentences with phrase «human use of fossil fuels»

Everyone has heard — especially after last summer — how human use of fossil fuels to produce energy will increase the frequency and severity of killer heat waves.

US researchers report in the journal Nature that they collected fossil pollens from 642 ponds and lake beds across Europe and North America, to provide a record of local temperature shifts in the last 11,700 years, to conclude that — without global warming as a consequence of profligate human use of fossil fuels — the world ought to be in a cool phase.

A U.N. panel of climate scientists predicts that a build - up of planet - warming greenhouse gases in the atmosphere, mainly from human use of fossil fuels, will cause ever more droughts, floods, heatwaves and rising sea levels.

The Early Anthropogenic Hypothesis (108) posits that mid-Holocene increases in CO2 and CH4 resulted from early land clearing and other agricultural practices and that these unprecedented interglacial trends in atmospheric composition set global climate on a trajectory toward warmer conditions long before human use of fossil fuels (108, 109).

The «Golden State» is already in the fourth year of devastating drought, and researchers have persistently warned that climate change — driven by global warming as a consequence of rising carbon dioxide levels in the atmosphere because of increasing human use of fossil fuels — could make things worse.

In two papers in the journal Earth Interactions, researchers have taken a closer look at the reality of this historic divide and the changing nature of the U.S. landscape as a consequence of climate change driven by ever - greater ratios of greenhouse gases in the atmosphere, in response to ever - more profligate human use of fossil fuels.

The inescapable if unfashionable conclusion is that the human use of fossil fuels has been causing the greening of the planet in three separate ways: first, by displacing firewood as a fuel; second, by warming the climate; and third, by raising carbon dioxide levels, which raise plant growth rates.

While many greenhouse gases occur naturally and are needed to create the greenhouse effect that keeps the Earth warm enough to support life, human use of fossil fuels is the main source of excess greenhouse gases.

And it's happening because of carbon dioxide and global warming: «human use of fossil fuels has been causing the greening of the planet in three separate ways: first, by displacing firewood as a fuel; second, by warming the climate; and third, by raising carbon dioxide levels, which raise plant growth rates.»