Without water there would be no life. Though that’s common knowledge, we still waste the precious resource. Worse, humans often make aquatic ecosystems uninhabitable for animals and plants through pollution and overfishing. This week, Global Ideas shows people trying to reverse the tide with new ideas on making water distribution more equitable and sustainable. That involves protecting ecosystems such as reefs and coasts, fishing more sustainably as well as protecting special marine species from extinction. It’s all aimed at preserving the critical resource for future generations.