Russia's invasion of Ukraine has highlighted how dependent the world is on fossil fuels. Scientists have been working on nuclear fusion for decades. China is developing a thorium reactor. Is this our energy future?

Poland's hoteliers and hostel owners are opening their doors without charge to Ukrainians. Poland is better known for rejecting refugees. But the response to its Ukrainian neighbors in this time of crisis could hardly be more different.

For many companies, trade with Russia is about to, or has already stopped. This is a particular problem for companies in eastern Germany. After all, some depend heavily on trade with Russia.

When and how will the West's sanctions affect the Russian oil economy? Could it collapse? We'll get the answers in an exclusive interview with Mikhail Krutikhin, an energy analyst from Moscow.

Russia’s leading banks have been excluded from the SWIFT international payment system. Russian companies can no longer use them to pay for imports. It’s the biggest weapon in the sanctions arsenal.

Energy prices around the world are exploding. That's hitting people on low incomes especially hard. In the US city of New Orleans, one company now leases solar cells to low-income families, cutting their costs and benefiting the environment.

Many products are sold as "sustainable" even though they're not. The problem is "sustainable" has become a relative term. What does sustainable actually mean, where does the term come from and what does it definitely not include?

They have names like Bitcoin, Ethereum or Monero. Digital cryptocurrencies are not affected by inflation. There are now more than 4,000 of these digital currencies, and they can be used in many online transactions. But how do they actually work?

Bitcoin has been on a bit of a roller-coaster ride. Originally it was intended as a means of payment but, given its high volatility, is that still possible? We put it to the test.

They have names like Bitcoin, Ethereum or Monero. Digital cryptocurrencies are not affected by inflation. There are now more than 4,000 of these digital currencies, and they can be used in many online transactions. But how do they actually work?