The AR5 concluded that human influence on the climate system is clear, evident from
increasing greenhouse gas concentrations in the atmosphere, positive radiative forcing …

Humans are recognized as having a major role in influencing environmental variability and
change, including their influence on the climate system. To advance scientists' …

The Working Group I contribution to the IPCC Fourth Assessment Report describes progress
in understanding of the human and natural drivers of climate change 1, observed climate …

The likely range of the human contribution to the global mean temperature increase over the
period 1951–2010 is 1.1 to 1.4 F (0.6 to 0.8 C), and the central estimate of the observed …

We are living in unusual times. Twentieth century climate was dominated by near universal
warming with almost all parts of the globe experiencing temperatures at the end of the …

Since the late nineteenth century, the earth's average surface temperature has risen by
about 1.18° C, mainly due to increased carbon dioxide emission into the atmosphere and …

Past attribution studies of climate change have assumed a null hypothesis of no role of
human activities. The challenge, then, is to prove that there is an anthropogenic component …

The greenhouse effect, global warming, global climate change: the environmental
phenomenon so important that it needs three names. Whatever one calls it, climate change …

The Working Group I contribution to the IPCC Fourth Assessment Report describes progress
in understanding of the human and natural drivers of climate change, 1 observed climate …

A crucial task for modem environmental science is to document and understand the ways in
which human impacts on the earth system interact with other processes of global change …