Research shows that climate change could make giant hailstones more common. Apocalyptic hail the size of a tennis ball hit parts of Belgium, smashing car windows and injuring dozens of people. Unfortunately, a 20-month-old child was killed by a falling stone. The gardens - some measuring 11cm wide - are the largest recorded in the region in two decades. But changing weather patterns could make such storms more common, a study suggests. During a thunderstorm, the rising wind carries water droplets into the atmosphere. When the air is cold enough, these droplets freeze. As moisture from the air collects on the outside of the frozen droplets, they become larger. The stone will continue to grow until the updraft that holds it can no longer support it. If there is a lot of moisture in the air, and the wind that traps it is very strong, then the hail will be larger. Climate change makes these conditions more likely because warmer air contains more water vapor. Strong storms with powerfu
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