Sentences with phrase «occurring as a result of human activity»

Not exact matches

Some greenhouse gases occur naturally in the atmosphere, while others result from human activities such as burning of fossil fuels such as coal.

Earthquakes may occur naturally or as a result of human activities.

Arsenic occurs naturally in the environment, and can also be present as the result of human activity, such as the use of arsenic - containing pesticides.

Those main conclusions are that climate is changing in ways unusual against the backdrop of natural variability; that human activities are responsible for most of this unusual change; that significant harm to human well - being is already occurring as a result; and that far larger --- perhaps catastrophic — damages will ensue if serious remedial action is not started soon.

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.