The Download newsletter discusses the impact of a “polycrisis” on young people’s mental health. This polycrisis refers to overlapping global crises such as climate change, conflicts, housing affordability issues, and concerns about AI taking jobs. These challenges have led to increased anxiety among children and young adults, who are growing up in this complex environment. Online support networks like Force of Nature and the Good Grief Network have gained significant participation from these individuals seeking help navigating their feelings and actions regarding these crises.

Meanwhile, there is a new interest in hydrogen as a potential climate solution, with researchers exploring underground sources of naturally occurring hydrogen gas. This “hydrogen gold rush” involves capturing this gas for use as an energy source, which could offer a cleaner alternative to fossil fuels. However, questions remain about the amount of natural hydrogen available, its extraction and storage methods, and whether it can be effectively utilized on a large scale. Despite these uncertainties, underground hydrogen is seen by many as having significant potential in addressing climate change concerns.

The article also touches upon other technology-related news stories including political campaigns using data center controversies to their advantage, advancements in personalized cancer vaccines, China’s achievement of landing a reusable rocket, and various developments in AI technologies and ethics. These diverse topics highlight the multifaceted nature of technological progress and its implications across different sectors.

This is a summary. Read the original at technologyreview.com.