The sun provides free energy for the taking. To what extent is this being used?
Solar power comes typically in the form of photovoltaic or concentrated solar. It's big business - that can help save our climate. Browse DW content on solar energy below.
From solar panels to apps that cut food waste, green tech is helping transform Africa. But its success rests on the continent's digitalization. Smart Africa's new Director General Lacina Koné told DW connectivity is key.
In 60 years of space exploration, we've placed almost 7,000 satellites in orbit. Less than a third still function. The rest is dangerous junk - and their number is growing. Here's how we might mitigate the threat.