What was a consequence of the hydrogen bomb tests that sparked international concern?

The testing of hydrogen bombs raised significant international concern primarily due to the health issues that emerged among civilians. These tests released dangerous levels of radiation into the atmosphere, which had direct implications for the health of populations living near test sites. People were exposed to radioactive fallout, leading to serious long-term health problems such as cancers and other illnesses.

This concern was compounded by the fact that testing often occurred in remote areas, with little regard for local populations or the environment, resulting in widespread fear about the safety of nuclear weapons testing. The international community became increasingly alarmed not only about the immediate health consequences but also about the potential for nuclear fallout affecting populations far beyond the test sites.

Overall, the health implications of hydrogen bomb tests highlighted the grave risks associated with nuclear weapons and underscored the need for regulatory measures and treaties to limit such testing, affecting global politics and public perception of nuclear weapons.