There is now widespread agreement among climate scientists that the earth is
warming as a result of human activity, primarily due to rising levels of carbon dioxide and other heat trapping atmospheric gases created by burning fossil fuels.
Not exact matches
``... a number
of scientific studies indicate that most global
warming... is due to the great concentration
of greenhouse gases released mainly
as a
result of human activity... these gases do not allow the warmth
of the sun's rays reflected by the earth to be dispersed in space.
... A number
of scientific studies indicate that most global
warming in recent decades is due to the great concentration
of greenhouse gases (carbon dioxide, methane, nitrogen oxides and others) released mainly
as a
result of human activity... Doomsday predictions can no longer be met with irony or disdain.
The world's experts have stated that the global
warming is largely due to
human activity — primarily
as the
result of reliance on fossil fuels.
The hurricane is spinning over waters that have
warmed in the last century
as a
result of human activity.
Also, a year ago, the Stanford team released poll findings indicating that three out
of four Americans believe that «the Earth has been gradually
warming due primarily or at least partly
as the
result of human activity and want the government to institute regulations to stop it.»
The report, written and reviewed by leading U.S. scientists
as part
of the National Climate Assessment, reinforces that
warming temperatures and extreme weather around the globe are «extremely likely» to be the
result of carbon pollution from
human activities.
Even allowing for the relative strength
of the effects, CO2 is still responsible for two - thirds
of the additional
warming caused by all the greenhouse gases emitted
as a
result of human activity.
Quoting directly Climate change
as a
result of human activities, or anthropogenic global
warming, is now generally accepted
as reality and includes a wide range
of climatic processes and impacts in the global system that are affected by
human activities.
On Monday, I asked him, in essence, if the shape
of the 20th - century temperature curve were to shift much
as a
result of some
of the issues that have come up in the disclosed e-mail messages and files, would that erode confidence in the keystone climate question (the high confidence expressed by the Intergovernmental Panel on Climate Change in 2007 that most
warming since 1950 is driven by
human activities)?
• Anyone who doubts that the threat
of large hurricanes is still being used
as part
of global
warming campaigns should look no further than the energy and climate platform
of a presidential candidate [pdf alert], who writes, «Global
warming is real, is happening now and is the
result of human activities.
«In considering the question
of human activity and climate change it is essential to distinguish between global
warming, which is a progressive increase in the annual mean global temperature, and
human -
activity - induced greenhouse
warming,
as may, for example, be caused by the release
of greenhouse gases into the atmosphere
as a
result of fossil fuel combustion or deforestation.»
Continued
warming and an increased understanding
of the U.S. temperature record,
as well
as multiple other sources
of evidence, have strengthened our confidence in the conclusions that the
warming trend is clear and primarily the
result of human activities.
But the IPCC concerns itself with consideration
of anthropogenic (i.e. man - made) global
warming (AGW)
as a
result of emissions
of greenhouse gases (notably carbon dioxide, CO2) from
human activities.
''... between 0.06 and 0.1 degrees Celsius, a very small fraction
of the
warming we're due to experience
as a
result of human activity.»
Scientific consensus shows that
as a
result of human activities, GHG concentrations in the atmosphere are at record high levels and data shows that the Earth has been
warming over the past 100 years, with the steepest increase in
warming in recent decades.
A certain amount
of continued
warming of the planet is projected to occur
as a
result of human - induced emissions to date; another 0.5 °F increase would be expected over the next few decades even if all emissions from
human activities suddenly stopped, 11 although natural variability could still play an important role over this time period.12 However, choices made now and in the next few decades will determine the amount
of additional future
warming.
«My interaction (over the years) with a broad segment
of AMS members (that I have met
as a
result of my seasonal hurricane forecasting and other
activities) who have spent a sizable portion
of their careers down in the meteorological trenches
of observations and forecasting, have indicated that a majority
of them do not agree that
humans are the primary cause
of global
warming.
Then, perhaps in the early years
of the next century, the climate could
warm up a little
as a
result of human activity, especially the greater amount
of carbon dioxide that will be released from the burning
of fossil fuels.
Yes, other factors have been in play in the past, but the
warming of the past 150 years or so has been the direct
result of CO2 increases (
as well
as increases in other greenhouse gases) due to
human activity.
This is despite a steady increase in radiative forcing
as a
result of human activities and has led some to question climate predictions
of substantial twenty - first century
warming (Lawson 2008; Carter 2008).
A wide range
of human activities affect marine biodiversity both in direct ways, such
as exploitation by fisheries, habitat loss due to dredging, filling, and other construction influences, fishing gear impacts, and pollution, and in less direct ways, including effects
of global change
resulting in acidification,
warmer waters, and coastal inundation.
Seven in ten Americans think that global
warming is happening, and almost three in five think that, if it is happening, it is mostly owing to
human activity, but only about one in seven know that nearly all climate scientists agree that global
warming is happening
as a
result of human activity.
As profesoor Quiggin has pointed out repeatedly, the «jury»
of international scientific opinion has long since returned a near - unamnimous verdict that global
warming is happening and that it is almost certainly the
result of changes made to the biospehere by
human activity.
They also now realize that other greenhouse gases are being released into the atmosphere
as the
result of human activity, and that they additionally contribute to global
warming and possible climate change.