There are more and more wind turbines in Germany, and one challenge is keeping them clean. In western Germany, a helicopter has been developed to this end - it's cheaper and more efficient than cleaning by hand.
Authorities have said they will soon call off the search for the over 5,000 still missing. At the same time, pupils and teachers have returned to school in the hard-hit town of Palu.
Trash bags have been deposited at Camp Two on the world's highest peak. The site - and a whole lot of garbage - was abandoned two years ago after a series of earthquake-triggered avalanches.
Turkish troops captured a strategic hill near Afrin as Turkey intensified its offensive against the Syrian Kurdish YPG group. President Recep Tayyip Erdogan has vowed again to "clean" Turkey's entire border with Syria.
As water levels begin to drop, rescue efforts are underway for more than a thousand people left stranded by the floods. More than 400 people have died since the monsoon season began in Kerala.
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