The device is inspired by the natural process of photosynthesis, in which plants produce energy by tapping on sunlight to separate water into hydrogen and oxygen. (techtimes.com)
It's a transition — and scientists are still trying to understand the magnitude of global climate change caused by humans in recent history compared to that caused by natural processes over the ages. (news.stanford.edu)
The results have been plagued by ambiguity, especially in the light of growing evidence that organic molecules can be formed by natural processes that do not involve life. (newscientist.com)