And to put that in
context during the last ice age, we were at a 180, so we were 100 ppm lower than in the preindustrial state.
Not exact matches
Here, we argue that the twentieth and twenty - first centuries, a period
during which the overwhelming majority of human - caused carbon emissions are likely to occur, need to be placed into a long - term
context that includes the past 20 millennia, when the
last Ice Age ended and human civilization developed, and the next ten millennia, over which time the projected impacts of anthropogenic climate change will grow and persist.
Argues that the twentieth and twenty - first centuries, a period
during which the overwhelming majority of human - caused carbon emissions are likely to occur, need to be placed into a long - term
context that includes the past 20 millennia, when the
last Ice Age ended and human civilization developed, and the next ten millennia, over which time the projected impacts of anthropogenic climate change will grow and persist