We may never run out of oil, though known reserves are expected to last for about 50 years, current estimates suggest. When you purchase through links on our site, we may earn an affiliate ...

There could be about a million 'orphan' oil and gas wells across the U.S. As they age, they can leak greenhouse gases or unhealthy chemicals.

Oil prices have climbed in recent weeks, spurred by concerns over supplies and geopolitical risks, including wars in Ukraine and the Middle East. Analysts say the momentum could carry prices ...