What evidence leads some scientists to believe that there is no global warming or it is not caused by human activity?

Answer 1

There is no evidence proving global warming is not happening. A very tiny number of scientists (usually not climate scientists) try to find evidence but they have found nothing.

There is a colossal amount of evidence proving it is happening:

• Temperature records rising and being broken.
• Sea levels rising.
• Ice caps and glaciers melting.
• Animal, bird and insect habitats changing.
• More unusual weather and more powerful storms.

Answer 2

Some scientists who question global warming or its human-caused origins argue that natural climate variability and cycles could be significant factors. They also may question the reliability of climate models and data used to support anthropogenic climate change theories. Additionally, some skeptics cite inconsistencies in temperature records or emphasize the role of other factors besides human activities in influencing the climate.