Almost the entire world is on the cusp of a giant solar energy boom. The reason: a massive reduction in solar technology costs over the past 20 years. An energy provider is now installing Germany's biggest solar park in the state of Brandenburg.

Funds from Germany's Renewable Energy Sources Act (EEG) have guaranteed high returns and served as start-up financing for green energy providers. Many biogas plants and wind turbines will now become unprofitable when the subsidy runs out in 2021.

German auto makers are scrambling to boost their electric car divisions. Did they start the switch too late? Do they offer viable alternatives to the trendsetter from California? With its new ID.4, VW presents a rival to Tesla's Model Y.

Tesla is building a huge factory near Berlin. It's going up fast, even before final planning permission has been granted. Politicians are excited about the jobs being created. Neighbors in Grünheide fear the impact on the environment.

Transportation expert Wolfgang Lohbeck says Tesla's eco-friendly reputation is not deserved: the cars are too big, and the carbon footprint of the batteries is huge. He says there are much better alternatives.

Rockets to Mars, Hyperloop tube travel, minding-reading tech -- what is Elon Musk going to dream up next? Tesla cars prove he can make things happen in reality. How does Musk do it? Who is he?

Some itinerant workers in the US live in mobile homes and travel from job to job, such as seasonal work at an Amazon warehouse, or harvesting crops. Some say they enjoy the freedom. Living in an RV is cheaper than having an apartment or a house.

David Enrich is a US journalist whose book Dark Towers recounts decades of dealings between Donald Trump and Germany's biggest bank. He thinks vast loans from Deutsche enabled Trump to appear rich and successful, which helped him win the presidency.

Exports from Hong Kong to the US will no longer be labeled 'Made in Hong Kong' as of November. The US has revoked its special trading rights as China takes ever greater control of the territory. Manufacturers there are worried.

The coronavirus crisis appears largely over in China. Early October is holiday season there, and visitors from other parts of the country are again to be seen on the streets of Beijing. Will tourism bounce back? And other industries?