1. 选B。根据Jonathan Patz ... led the study判断出这名科学家是负责这项研究的人,因此选B。in charge of是"负责"的意思。
2. 选C。根据Health and climate scien-tists have mapped how climate change affects different parts of the world in different ways判断出A是错误的；根据It is the first such United Nations meeting since the Kyoto Protocol took effect earlier this year可判断出B错；根据poor countries least responsible(对……负责) for the warming判断出D错。
