New research builds on previous work to identify a link between microplastic pollution and antibiotic resistance.
Lack of water continues to be a major cause of concern for many nations, especially in Africa.
Technologies to harness the power of water are crucial for a low-emissions future, but hydropower can cause serious damage.
Only about half of the heavy metal in the sea results from rainfall. The other half comes from gaseous sources.
German scientists say the July floods were about more than rain, and climate models need to adjust for factors rarely seen in Central Europe.
Water rights activist Óscar Eyraud Adams died in Mexico. 12 wildlife defenders died in DR Congo. Some 227 global activists died last year.