<human>: Question: Who is a professor of civil and environmental engineering at Stanford University?
Answer: Mark Z. Jacobson, professor of civil and environmental engineering at Stanford University and director of its Atmosphere and Energy Program says producing all new energy with wind power, solar power, and hydropower by 2030 is feasible and existing energy supply arrangements could be replaced by 2050.
 Is the question answered in a satisfactory fashion?

OPTIONS:
- yes
- no
<bot>: yes