Original sentence: The finding that the climate has warmed in recent decades and that human activities are already contributing adversely to global climate change has been endorsed by every national science academy that has issued a statement on climate change, including the science academies of all of the major industrialized countries
Edited sentence: However, weather or not man is to blame is still up in the air.The finding that the climate has warmed in recent decades has been endorsed by every national science academy that has issued a statement on climate change, including the science academies of all of the major industrialized countries