On the savannahs of southern Africa, far from any sea ice, a warmer and drier climate complicates the many challenges already facing endangered cheetahs.
The impact of planes on the climate is complicated and not perfectly understood.
Some polls suggest that the recent controversy has eroded public support for action on climate change, complicating the politics of that issue in Washington and other world capitals.
India's climate, always complicated by the Himalayas on one side and turbulent oceans on the two others, has been particularly unreliable in recent years.
In addition, these migrations and the associated climate are complicated by the presence of landmasses and major mountain features, particularly in the Northern Hemisphere.
The political climate has complicated the city's plan to spread new arrivals around, rather than send them to areas that already have a high concentration of immigrants.
Understanding the spatial and temporal variability of rainfall has always been a great challenge, and the impacts of climate change further complicate this issue.
In addition, the current key message CCS as a key solution for combating climate change is too complicated (less complicated message: 'enabling zero emission power plants').
