Question

The fourth IPCC Report of 2007 concluded that _________.

sea ice is thickening in both Arctic and Antarctic waters
there is no strong evidence that human activity is responsible for climate change
sea level will rise by three meters by the end of this century
the atmospheric carbon dioxide level has not changed significantly in the past 20 years
climate change models can mimic present-day conditions only if human emissions are taken into account

Answer 1

The fourth IPCC Report of 2007 concluded that climate change models can mimic present-day conditions only if human emissions are taken into account.

There is strong evidence that human activity is responsible for climate change, and it is causing impacts such as the decline of Arctic sea ice, sea level rise, and the melting of glaciers and polar ice caps.

Step-by-step explanation:

The fourth IPCC Report of 2007 concluded that climate change models can mimic present-day conditions only if human emissions are taken into account.

The report stated that there is strong evidence that human activity is responsible for climate change and that human emissions of greenhouse gases, such as carbon dioxide, are contributing to the warming of the planet.

The report also highlighted the impacts of climate change, including the decline of Arctic sea ice, sea level rise, and the melting of glaciers and polar ice caps.

The fourth IPCC Report of 2007 concluded that climate change models can mimic present-day conditions only if human emissions are taken into account.