The world’s rivers are at breaking point. Can we save them before it is too late?

In this week’s newsletter: As the Guardian launches a year-long project, Our Rivers, we take stock of the issues facing waterways around the worldDon’t get Down to Earth delivered to your inbox? Sign up hereThe nicknames of the world’s biggest rivers give a sense of how we feel about them: “the great river”, “the river that swallows all rivers”, “Mother Ganga” and “Old father Thames”. They feed and water us, and many other animal