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2 A This involves firing a rocket containing silver iodide into a cloud.

5 B If this works, it will reduce the number of natural disasters like hurricanes and

floods.

1 C So imagine a world in which we could control the weather!

4 D Cloud-seeding can go wrong, though!

3 E It claims that it has stopped hailstorms, ended droughts and even put out fires.

F If there's a clear blue sky, cloud-seeding won't work.

If you're having an outdoor party or a picnic, you don't want a storm to ruin it for you. In the same way, if you're a farmer, you need the sun to shine and the rain to pour at the right time for the best crops. 1 C So imagine a world in which we could control the weather! Well, some scientists believe that they can do just that!

One way to control the weather that scientists have already used is 'cloud seeding'. 2 A This involves firing a rocket containing silver iodide into a cloud. When you do this, drops of water in the clouds attach to the particles to make raindrops. Believe it or not, in China there is a "Weather Modification Office" that often uses cloud seeding! 3 E It claims that it has stopped hailstorms, ended droughts and even put out fires. In 2008, it used 1,104 cloud-seeding rockets to keep the opening ceremony of the Olympic Games dry. It 'seeded' the clouds before they got to Beijing, so it didn't rain on the athletes. In other places, scientists have also 'seeded' clouds with dry ice to get rid of fog at airports. 4 D Cloud-seeding can go wrong, though! In 2009, Chinese meteorologists were trying to create rain during a drought when a cold front arrived and turned the rain into a heavy snowstorm. Beijing froze and there was chaos on the roads!

Some scientists don't believe that we can really control the weather, but others think that in the future, we will be able to control it with 'nanobots' or microscopic robots.

These nanobots could make changes in the atmosphere and stop storms before they

form. [5] B If this works, it will reduce the number of natural disasters like hurricanes and floods.Until then, though, we'll have to keep an eye on the weather report and take an umbrella to our picnics, just in case!