Question: Are you's having any plans for the Qatar 2022 World Cup as it will be extremely hot. Have you's thought about any ideas, like artificial clouds?

Marcus Johns answered on 14 Jun 2014:

During my undergraduate degree one of the final year design projects actually tried to find an answer to this problem. I think the group looking at this ended up designing a very large air conditioning unit that used far too much electricity to power it – it’s much harder to cool something down than heat it up!
Engineers have looked at termite nests in order to try to cool large buildings down. Termite nests are much cooler than the land around them because they create an intricate system of tunnels that allows hot air to escape out the top whilst pulling cooler air into the nest from the bottom. This creates a flow of air and cools the nest down. There’s a building in Zimbabwe that uses a similar system meaning that it uses less than 10 % of the electricity to cool it down compared to a building of the same size that uses the air conditioning units found in homes.
Artificial clouds would be a good idea, but the process to create these involves spraying tiny particles, called nanoparticles, into the atmosphere. Water condenses on these particles creating clouds and eventually rain. However, we don’t yet know exactly how these particles affect the human body if they get inside us, which means that we shouldn’t use them.