This week's viewer question comes from Rogélio González Labastida in Mexico.

This week's question comes from Wendel Geraldo in Brazil: What's being done about space junk?

The construction industry releases enormous amounts of carbon dioxide. Now one Canadian company has developed a technology to make a cement substitute from industrial waste and CO2, thereby trapping this greenhouse gas in the concrete.

This week's question comes from Quetzalcoatl Tlatoani in Mexico.

This week's Tomorrow Today question comes from Brown Mbadiwe in Nigeria.

Physicist Laura Kreidberg studies exoplanets using the James Webb Space Telescope. It’s been beaming back fascinating, highly detailed images from space for several months.

There's no need to remember birthdays, maps, special moments - it's all saved on your phone. But you might want to keep your brain in shape.

Nuclear energy can be used to generate electricity without climate-damaging greenhouse gases. But there’s also the risk of a nuclear catastrophe and the problem of nuclear waste. Do we need nuclear energy to stop climate change?

This week's question to Tomorrow Today comes from Raphael Glary in Nigeria.

This week's question for Tomorrow Today! comes from Luis Correra in Panama.