What is most likely to cause widespread change in the climate on earth?

Answer 1

Volcanoes are a good example of one event that could cool the atmosphere, though it needs to be a huge explosive eruption, usually in the tropics. Another would be a reduction in sun spots, though this only has a minor effect. Finally, orbital variations can cool the earth, though this is at much longer time scales than humans would observe.

OR fridge doors being left open

Answer 2

The main cause - is that we're still 'emerging' from the last ice-age... therefore temperatures will continue to rise. HOWEVER - the pollution emitted by man-made sources is an accelerating factor that MUST be taken into consideration.

Answer 3

The burning of fossil fuels, deforestation, and industrial activities are the primary causes of widespread climate change on Earth. These activities release greenhouse gases into the atmosphere, leading to an increase in global temperatures and resulting in various impacts such as sea level rise, extreme weather events, and ecosystem disruptions.

Answer 4

A volcano because as it eruptes the lava ash goes into the air and blocks the sun causing it to cool the temperature in the atmosphere.

Answer 5

An event that can cause sudden changes to Earth's global climate is something similar to the Permian-Triassic extinction event. Massive volcanism is a possible cause.